Glossary
1,802 concepts taught in the English courses, from “.gitignore” to “Year-to-date total”. Each concept links to the lesson that explains it.
A
- ABC classificationBusiness analytics
- AbortControllerFront-end
- Absence reasons and sensitive dataBusiness analytics
- Absenteeism rateBusiness analytics
- Absolute and mixed referencesExcel
- Absolute and relative pathsFoundations
- Abstract classesPHP
- Abstract classesJava
- Abuse and data leaksGenerative AI
- Acceptance criteriaCross-functional skills
- Acceptance testing and performancePower BI
- Access controlBack-end
- Access requestCross-functional skills
- Access rightsGenerative AI
- AccessibilityPower BI
- Accessibility landmarksFront-end
- Accessible formsFront-end
- AccumulatorsJava
- Acquisition cohortBusiness analytics
- Action titleData analysis
- Actions and connectorsPower Platform
- Activation functionsData science
- Adaptive grids (repeat, minmax, auto-fit)Front-end
- Adaptive query execution (AQE)Data engineering
- AdminPython for the web
- Advanced parametersPython
- Affinity synthesisCross-functional skills
- Agent-tool loopGenerative AI
- Aggregate disclosure thresholdBusiness analytics
- Aggregate tableData engineering
- AggregationPython for the web
- Aggregation functionsPower BI
- AgilityCross-functional skills
- AI gatewayGenerative AI
- AI literacyGenerative AI
- AI systems inventoryGenerative AI
- AI usage policyGenerative AI
- Alert rulesGenerative AI
- Alerts and budgetsCloud and DevOps
- Algorithmic biasGenerative AI
- AlgorithmicsFoundations
- ALL and REMOVEFILTERSPower BI
- ALLEXCEPTPower BI
- ALLSELECTEDPower BI
- Analysis summaryData analysis
- Anatomy of a CSS ruleFront-end
- AND, OR, NOTSQL
- Angular routerFront-end
- AnnotationData analysis
- AnnotationsPython
- Annotations and expressionsPython for the web
- Anonymization and pseudonymizationCross-functional skills
- Anonymous and arrow functionsPHP
- Answer faithfulnessGenerative AI
- Anti-joinSQL
- API clientServer-side JavaScript
- API contractServer-side JavaScript
- API ResourcesPHP
- API routesPHP
- APIRouterPython for the web
- App configurationMobile
- App RouterFront-end
- App sharingPower Platform
- Append queriesPower BI
- Application funnelBusiness analytics
- Applied stepsPower BI
- Apply to each loopsPower Platform
- ApprovalsPower Platform
- Approved toolsGenerative AI
- Approximate index (HNSW, IVFFlat)Generative AI
- Approximate lookupExcel
- apt package managementCloud and DevOps
- Architecture and executorsData engineering
- argparsePython
- ARIAFront-end
- ARIMA / SARIMAData science
- Arithmetic operatorsFoundations
- Arrange / Act / Assert structureJava
- Arrange-Act-AssertBack-end
- Array functionsPHP
- Array methods (map, filter, reduce)Front-end
- ArrayListJava
- ArraysFront-end
- ArraysPHP
- ArraysJava
- ArtifactsCloud and DevOps
- ArtisanPHP
- as const and satisfiesFront-end
- assertAllJava
- AssertionsBack-end
- assertThrowsJava
- Assets and data-driven schedulingData engineering
- Assisted analysisGenerative AI
- Assisted writingGenerative AI
- Async routesServer-side JavaScript
- async/awaitFront-end
- Asynchronous error handlingFront-end
- Asynchronous programmingServer-side JavaScript
- Asynchronous testsBack-end
- Asynchronous try/catchFront-end
- AsyncStorageMobile
- AttentionData science
- Attention cache (KV cache)Generative AI
- Attribution modelsBusiness analytics
- Audience analysisData analysis
- Audience measurementWebsites and CMS
- AuthenticationBack-end
- AuthenticationPython for the web
- Authentication and authorizationPHP
- Auto date/timePower BI
- AutocorrelationData science
- AutoFilterExcel
- AutogradData science
- Automated decision-makingCross-functional skills
- Automated Excel reportPython
- Automated testsFoundations
- Automatic aggregationPower BI
- Automatic metricsGenerative AI
- Automatic retriesData engineering
- Automatic scalingCloud and DevOps
- Automatic validationPython for the web
- Availability zonesCloud and DevOps
- Average order valueData analysis
- Average order valueWebsites and CMS
- Axes-level functionsPython
- Axis formattingPython
B
- B-tree indexSQL
- BacktestingData science
- Backup and retentionCloud and DevOps
- BackupsCross-functional skills
- Backups and restorationWebsites and CMS
- Backups and restoreCloud and DevOps
- Bag of wordsData science
- Bars and histogramsPython
- BaselineData science
- Bash scriptsFoundations
- Basic selectorsFront-end
- Basic syntaxPHP
- Basic typesFoundations
- Basic typesPython
- Basic visualsPower BI
- Bayes' theoremStatistics
- Bean Validation (Jakarta Validation)Java
- Best practices and governancePower Platform
- BFS and DFS traversalsFoundations
- BI workflowPower BI
- Bias-variance trade-offData science
- Big O notationFoundations
- Billing modelsCloud and DevOps
- Binary searchFoundations
- Binomial distributionStatistics
- Bivariate analysisData analysis
- BladePHP
- Blade componentsPHP
- Blank values (BLANK)Power BI
- Block editorWebsites and CMS
- Blocking thresholdsData analysis
- BM25 lexical searchGenerative AI
- Bookmarks and buttonsPower BI
- Boolean filteringPython
- Boolean logicFoundations
- Boolean masksPython
- Booleans and logical operatorsPython
- BootstrapStatistics
- Box alignmentFront-end
- Box modelFront-end
- BPMN gatewaysCross-functional skills
- BPMN notationCross-functional skills
- Branch protectionCloud and DevOps
- BranchesFoundations
- Break-even pointBusiness analytics
- Breakeven ROASBusiness analytics
- Breaking changeData engineering
- BRIN indexSQL
- Broadcast joinData engineering
- BudgetBusiness analytics
- Building dimensionsPower BI
- Business featuresData science
- Business glossaryData engineering
- Business profileWebsites and CMS
- Business rulesCross-functional skills
- Byte Pair Encoding (BPE)Data science
C
- CachePHP
- CachingData engineering
- CALCULATEPower BI
- Calculated columnsSQL
- Calculated columnsPower BI
- Calculated fieldExcel
- Calculation groupsPower BI
- Call loggingGenerative AI
- Callback functionsFront-end
- Calling a model APIGenerative AI
- Campaign A/B testBusiness analytics
- Cancellations and refundsWebsites and CMS
- Cancelling a generationGenerative AI
- Canvas appPower Platform
- Capacity and monitoringPower BI
- Card sortingCross-functional skills
- CardinalitiesSQL
- CardinalityPower BI
- Cascade and orphanRemovalJava
- Cascade and rule orderFront-end
- CASE WHENSQL
- Cash flow planBusiness analytics
- Catalog and categoriesWebsites and CMS
- Catchup and backfillData engineering
- category typePython
- Central limit theoremStatistics
- Chained CTEsSQL
- ChangeData analysis
- Change over timeData analysis
- Change request managementCross-functional skills
- ChangeNotifierMobile
- Channel groupingBusiness analytics
- Chart of accounts and line itemsBusiness analytics
- Chart readabilityPower BI
- Chart selectionData analysis
- ChartsExcel
- CheckpointsGenerative AI
- Chi-square testStatistics
- Choosing a chartPython
- Choosing a modelGenerative AI
- Choosing a providerCloud and DevOps
- Choosing a visualPower BI
- Choosing the automation toolExcel
- Choosing the chart typeExcel
- Choosing the number of clustersData science
- Choosing the platformWebsites and CMS
- Chunk metadataGenerative AI
- ChunkingData science
- ChurnData analysis
- CI supply chain securityCloud and DevOps
- CI/CDBack-end
- Citation checkingGenerative AI
- Class constantsPHP
- Class-based generic viewsPython for the web
- ClassesJava
- Classes and instancesPython
- Classes and objectsPHP
- Cleaning pipelinePython
- Cleanup and dependenciesFront-end
- Cloud flowsPower Platform
- Cluster profilingData science
- ClusteringData science
- ClusteringData engineering
- Code coverageBack-end
- Code reviewFoundations
- Coefficient of variationStatistics
- Collections frameworkJava
- CollectorsJava
- Color accessibilityData analysis
- Color encoding (hue)Python
- ColorsFront-end
- Column aliases (AS)SQL
- Column functionsData engineering
- ColumnTransformerData science
- CommitFoundations
- Commitments and interruptible capacityCloud and DevOps
- Communicating uncertaintyData analysis
- Comparable and ComparatorJava
- ComparatorJava
- Components, variants and auto layoutCross-functional skills
- ComposablesFront-end
- ComposerPHP
- Composing configurationsCloud and DevOps
- Composite indexSQL
- CompositionJava
- Composition effectBusiness analytics
- Computed columnsPython
- computed, watch and watchEffectFront-end
- ConcatenationPython
- Condition in ON or in WHERESQL
- Conditional aggregationSQL
- Conditional columnPower BI
- Conditional formattingPower BI
- Conditional formattingExcel
- Conditional probabilityStatistics
- Conditional renderingFront-end
- ConditionsPython
- ConditionsFront-end
- ConditionsPHP
- ConditionsJava
- Conditions and switchPower Platform
- Confidence intervalStatistics
- ConfigMapsCloud and DevOps
- Configuration through the environmentData science
- Configuration through the environmentServer-side JavaScript
- ConflictsFoundations
- Confusion matrixData science
- Connections, variables, and secretsData engineering
- ConnectorsPower Platform
- Consent and trackersWebsites and CMS
- Consistency checksData analysis
- Consistency checksExcel
- Console input/outputJava
- Console, CLI and APICloud and DevOps
- Constructor and promotionPHP
- ConstructorsJava
- Contact formsWebsites and CMS
- Container queriesFront-end
- ContainersBack-end
- Content-Security-PolicyBack-end
- ContextFront-end
- Context budgetGenerative AI
- Context transitionPower BI
- Context windowFoundations
- Continuous deploymentCloud and DevOps
- Continuous improvementData engineering
- Continuous integrationBack-end
- Continuous integrationData engineering
- Continuous integrationCloud and DevOps
- Continuous integration and deploymentData science
- Contrast and colorsFront-end
- Contribution marginBusiness analytics
- Contribution to growthData analysis
- Control plane and nodesCloud and DevOps
- ControllersPHP
- Controls and propertiesPower Platform
- Conversion funnelBusiness analytics
- Conversion journeysBusiness analytics
- Conversion rateData analysis
- Conversion rateWebsites and CMS
- ConvolutionData science
- Convolutional networkData science
- Copying and immutabilityFront-end
- Core Web VitalsFront-end
- Correction loopGenerative AI
- Correlated subquerySQL
- CORSBack-end
- CORSServer-side JavaScript
- Cosine similarityData science
- Cost management (FinOps)Cloud and DevOps
- Cost per hireBusiness analytics
- Cost per requestGenerative AI
- count and for_eachCloud and DevOps
- COUNT, SUM, AVG, MIN, MAXSQL
- COUNT(DISTINCT)SQL
- Counting functionsPower BI
- CountsPython
- Counts and frequenciesStatistics
- CovarianceStatistics
- Covering index (INCLUDE)SQL
- Crawling and indexingFront-end
- CREATE TABLESQL
- Creating elementsFront-end
- CriteriaExcel
- cron schedulingCloud and DevOps
- cross_validateData science
- Cross-filter directionPower BI
- Cross-tabulationStatistics
- Cross-validationData science
- CRUD operationsPython for the web
- CRUD serviceBack-end
- Cryptographic saltBack-end
- CSRFBack-end
- CSRF protectionPython for the web
- CSS GridFront-end
- CSV extractionData analysis
- csv modulePython
- CTE (WITH)SQL
- Cumulative revenue per customerBusiness analytics
- Current and target processCross-functional skills
- Custom columnPower BI
- Custom exceptionsPython
- Custom exceptionsPHP
- Custom exceptionsJava
- Custom hooksFront-end
- Custom properties (CSS variables)Front-end
- Custom user modelPython for the web
- Custom validation ruleExcel
- Customer acquisition costData analysis
- Customer lifetime valueData analysis
- Customer reviewsWebsites and CMS
- Cyclical encodingData science
D
- DAG (directed acyclic graph)Data engineering
- DAG testsData engineering
- Data breachCross-functional skills
- Data cachingFront-end
- Data catalogData engineering
- Data cleaningPower BI
- Data confidentialityGenerative AI
- Data contractData engineering
- Data destinationsPower BI
- Data driftData science
- Data entryExcel
- Data gatewayPower BI
- Data importPower BI
- Data intervalData engineering
- Data lakeData engineering
- Data leakageData science
- Data loadingFront-end
- Data loadingServer-side JavaScript
- Data modelExcel
- Data pipelinesPower BI
- Data privacyFoundations
- Data profilingData analysis
- Data protection by designCross-functional skills
- Data qualityData analysis
- Data refreshExcel
- Data repositoryServer-side JavaScript
- Data schemasServer-side JavaScript
- Data securityPower Platform
- Data securityCross-functional skills
- Data sourcesPower Platform
- Data subject rightsCross-functional skills
- Data tablesFront-end
- Data testsData engineering
- Data typesSQL
- Data typesPower BI
- Data validationPython
- Data validationBack-end
- Data validationExcel
- Data warehouseData engineering
- DatabaseServer-side JavaScript
- DatabasePython for the web
- DataclassesPython
- Dataflows Gen2Power BI
- DataFramePython
- Dataset and DataLoaderData science
- Date dimensionData engineering
- Date functionsExcel
- Date groupingExcel
- Date tablePower BI
- Dates with .dtPython
- DatetimeIndexData science
- DAX debuggingPower BI
- DAX performancePower BI
- DAX syntaxPower BI
- DBSCANData science
- dbt projectData engineering
- DDL: CREATE, ALTER, DROPSQL
- DebuggingFoundations
- DebuggingExcel
- DecisionStatistics
- Decision thresholdData science
- Decision treeData science
- Declarative infrastructure as codeCloud and DevOps
- DeclutteringData analysis
- Decoding (temperature, top-p)Data science
- DecompositionData science
- Deferrable operatorsData engineering
- Defined namesExcel
- Definition of DoneCross-functional skills
- Definition of the cloudCloud and DevOps
- Delay between ordersBusiness analytics
- DelegationPower Platform
- Deletion and retentionGenerative AI
- Delta formatPower BI
- Delta table optimizationPower BI
- Demand forecastingBusiness analytics
- DenormalizationSQL
- Density-based clusteringData science
- Dependency cacheCloud and DevOps
- Dependency injectionBack-end
- Dependency injectionPython for the web
- Dependency injectionJava
- Dependency injectionFront-end
- DeploymentPython for the web
- DeploymentData engineering
- DeploymentFront-end
- Deployment concurrencyCloud and DevOps
- Deployment environmentsCloud and DevOps
- Deployment pipelinesPower BI
- Deployments and ReplicaSetsCloud and DevOps
- Derived queriesJava
- Derived tableSQL
- Destructuring and spreadFront-end
- Detecting duplicatesPython
- Detecting missing valuesPython
- Development proxyServer-side JavaScript
- Device securityCross-functional skills
- DictionariesPython
- Dictionaries (introduction)Foundations
- DictionaryFoundations
- DifferencingData science
- Dimensional modelingData engineering
- Dimensionality reductionData science
- Dimensions and SCDSQL
- Direct Lake modePower BI
- Direct sharingPower BI
- Directives v-if, v-for, v-bind, v-onFront-end
- Directories and mapsWebsites and CMS
- DiscretizationData science
- Discriminated unionsFront-end
- Disk spaceCloud and DevOps
- Display typesFront-end
- DISTINCTSQL
- Distributed joinsData engineering
- DIVIDEPower BI
- Django ORMPython for the web
- Django testsPython for the web
- DockerData science
- Docker CLIBack-end
- Docker ComposeBack-end
- Docker networksBack-end
- DockerfileBack-end
- Document summarizationGenerative AI
- DocumentationGenerative AI
- DocumentationData engineering
- DOM typesFront-end
- DriftGenerative AI
- Drift detectionCloud and DevOps
- Drill-downPower BI
- DrillthroughPower BI
- Driver, executors, and clusterData engineering
- Drop-down listExcel
- Drop-off rateBusiness analytics
- DropoutData science
- DSN and connection optionsPHP
- DTO (Data Transfer Object)Java
- DuplicatesData analysis
- Dynamic array (list)Foundations
- Dynamic arrays and spillingExcel
- Dynamic contentPower Platform
- Dynamic RLSPower BI
- Dynamic routes and parametersFront-end
- Dynamic segmentsFront-end
- Dynamic titlesPower BI
E
- Eager loadingPHP
- Early stoppingData science
- EAS BuildMobile
- Economic order quantityBusiness analytics
- Edge casesFoundations
- Edge casesBack-end
- Edge casesJava
- Edit formsPower Platform
- Editorial lineWebsites and CMS
- Elbow methodData science
- Eloquent ORMPHP
- ELT and transformation layersData engineering
- EmbeddingData science
- EmbeddingsGenerative AI
- Emitted eventsFront-end
- EncapsulationJava
- Encapsulation and visibilityPHP
- Entities and mappingJava
- Entity / DTO mappingJava
- Entity hydrationPHP
- EnumerationsPHP
- Environment variablesFoundations
- Environment variablesFront-end
- Environments and solutionsPower Platform
- Epic and story mappingCross-functional skills
- equals and hashCodeJava
- Error formatServer-side JavaScript
- Error handlingFront-end
- Error handlingBack-end
- Error handlingServer-side JavaScript
- Error handlingExcel
- Error handlingPower Platform
- Error valuesExcel
- ES modulesFront-end
- ES modulesServer-side JavaScript
- Escaping and XSSPHP
- EstimatorData science
- ET and OUExcel
- ETL and ELTData analysis
- ETL stepsData analysis
- European AI regulation (AI Act)Generative AI
- Evaluation rubricGenerative AI
- Evaluation setGenerative AI
- Event delegationFront-end
- Event handlingFront-end
- Event loopFront-end
- Event loopServer-side JavaScript
- Event objectFront-end
- Event propagationFront-end
- EventEmitterServer-side JavaScript
- EventsFront-end
- EventsCloud and DevOps
- Examples in the promptGenerative AI
- Excel object modelExcel
- Excel Online (Business) connectorPower Platform
- ExcelScript APIExcel
- ExceptionsPHP
- ExceptionsJava
- Exchange formatsPython
- Execution timeoutsData engineering
- Executive summaryData analysis
- Expected valueStatistics
- Experiment hypothesisStatistics
- Experiment trackingData science
- EXPLAINSQL
- EXPLAIN ANALYZE and BUFFERSSQL
- Explained varianceData science
- ExpoMobile
- Expo RouterMobile
- Exponential smoothingData science
- ExposuresData engineering
- Express applicationServer-side JavaScript
- Expression indexSQL
- ExpressionsPower Platform
F
- f-stringsPython
- F1 scoreData science
- Fabric semantic modelPower BI
- FacetsPython
- Fact tablePower BI
- Fact tableData engineering
- Fact table grainSQL
- Facts and dimensionsPower BI
- Failure callbacksData engineering
- FairnessGenerative AI
- Fake transfer fraudCross-functional skills
- Fakes and factoriesPHP
- Fallback and spending capGenerative AI
- FastAPI and PydanticData science
- FastAPI applicationPython for the web
- Features and target variableData science
- fetchFront-end
- Fetch modesPHP
- Field parametersPower BI
- Field typesPython for the web
- Figure and AxesPython
- Figure structurePython
- File managementFoundations
- File systemServer-side JavaScript
- Filter contextPower BI
- Filter-based selectionData science
- FILTER, UNIQUE, SORT, SORTBYExcel
- FILTER, VALUES and DAX queriesPower BI
- Filters panePower BI
- Financial dashboardBusiness analytics
- Financing needBusiness analytics
- Finding files with findFoundations
- Fine-tuningData science
- First release and scopeCross-functional skills
- First stepsCross-functional skills
- FIRST_VALUESQL
- fit / predict / scoreData science
- Fixed cost allocationBusiness analytics
- Flash messagesPHP
- FlatListMobile
- Flex sizingFront-end
- Flex wrappingFront-end
- FlexboxFront-end
- Fluid values with clamp()Front-end
- Flutter testsMobile
- Flyway migrationsJava
- Focus managementFront-end
- Folder connectorPower BI
- for and while loopsFoundations
- for and while loopsPython
- For, For Each, Do While loopsExcel
- Forecast error (MAE, bias)Business analytics
- Forecast metricsData science
- ForecastingCross-functional skills
- FOREIGN KEY / REFERENCESSQL
- Foreign key indexesSQL
- ForeignKey and ManyToMany relationshipsPython for the web
- Form ActionsFront-end
- Form RequestPHP
- FormsFront-end
- FormsPython for the web
- Forms in JavaScriptFront-end
- Formula auditingExcel
- FormulasExcel
- Frequency and duration of absencesBusiness analytics
- Full-stack architectureServer-side JavaScript
- Full-stack authenticationServer-side JavaScript
- Full-stack deploymentServer-side JavaScript
- Function componentsFront-end
- Function syntaxExcel
- Function typesFront-end
- Functional and non-functional requirementsCross-functional skills
- Functional dependenciesSQL
- Functional specificationCross-functional skills
- FunctionsFoundations
- FunctionsPython
- FunctionsFront-end
- FunctionsPHP
- Functions and classesMobile
- Funnel by segmentBusiness analytics
- Future, async and awaitMobile
- FutureBuilderMobile
G
- GalleriesPower Platform
- GDPRData engineering
- GDPR and AIGenerative AI
- GDPR principlesCross-functional skills
- Gender pay gapBusiness analytics
- General settingsWebsites and CMS
- General terms and conditions of saleWebsites and CMS
- GeneralizationData science
- Generation parametersGenerative AI
- GeneratorsPython
- Generic testsData engineering
- GenericsFront-end
- GenericsJava
- Gherkin and examplesCross-functional skills
- GIN indexSQL
- GiST indexSQL
- Git repositoryFoundations
- GitHub Actions workflowCloud and DevOps
- GitHub authenticationFoundations
- Go-live decisionGenerative AI
- Goal SeekExcel
- GovernancePower BI
- Governance and lineagePower BI
- GPU memory (VRAM)Generative AI
- GradientData science
- Gradient boostingData science
- GrainPower BI
- Graphical integrityData analysis
- GraphsFoundations
- GridSearchCVData science
- Gross marginData analysis
- Group and time-based validationData science
- Group ByPower BI
- GROUP BYSQL
- groupbyPython
- Grouping by rangeExcel
- GuardrailsGenerative AI
H
- HallucinationsFoundations
- HallucinationsGenerative AI
- Hash partitioningData engineering
- Hash tableFoundations
- HAVINGSQL
- Headcount on a date and average headcountBusiness analytics
- Heading hierarchyFront-end
- Health probesCloud and DevOps
- HealthcheckBack-end
- Heap and priority queueFoundations
- Heuristic evaluationCross-functional skills
- HibernateJava
- Hierarchical clusteringData science
- High availabilityCloud and DevOps
- High-fidelity mockupCross-functional skills
- Higher-order functionsPython
- HistogramData analysis
- History (log, diff)Foundations
- Holt-WintersData science
- HorizontalPodAutoscalerCloud and DevOps
- HR data confidentialityBusiness analytics
- HTML escapingBack-end
- HTML escaping (XSS)PHP
- HTML exportPython
- HTTP authenticationBack-end
- HTTP cache and ETagBack-end
- HTTP codesPHP
- HTTP headersBack-end
- HTTP methodsBack-end
- HTTP request and responseBack-end
- HTTP requestsPython
- HTTP requestsMobile
- HttpClientFront-end
- HTTPExceptionPython for the web
- Human approvalGenerative AI
- Human oversightGenerative AI
- Hybrid searchGenerative AI
- HyperlinksFront-end
- HyperparameterData science
- Hyperparameter tuningData science
- Hypothesis testStatistics
I
- IaaS, PaaS, SaaSCloud and DevOps
- IdempotenceData engineering
- IdempotenceCloud and DevOps
- IdempotencyData analysis
- IdempotencyGenerative AI
- Identity and access management (IAM)Cloud and DevOps
- if / elif / else conditionsFoundations
- If and Select CaseExcel
- Image and containerData science
- Image buildBack-end
- Image registryBack-end
- Image securityBack-end
- ImagesBack-end
- Images and alternative textFront-end
- ImmutabilityJava
- Immutable updatesFront-end
- Impact assessment (DPIA)Cross-functional skills
- Import and moved blocksCloud and DevOps
- ImputationData analysis
- ImputationPython
- ImputationData science
- Imputation by groupPython
- IN and EXISTSSQL
- In-store pickupWebsites and CMS
- IN, BETWEEN, LIKESQL
- Inactive relationshipPower BI
- Incident managementData engineering
- Income statementBusiness analytics
- Incremental indexingGenerative AI
- Incremental modelData engineering
- Incremental refreshPower BI
- IncrementalityBusiness analytics
- INDEX and EQUIVExcel
- Indexing pipelineGenerative AI
- Indicator alertsBusiness analytics
- Indirect prompt injectionGenerative AI
- InertiaData science
- Inference APIData science
- Information architectureCross-functional skills
- Ingress and Ingress controllerCloud and DevOps
- InheritancePython
- InheritanceFront-end
- InheritancePHP
- InheritanceJava
- Initial explorationPython
- INNER JOINSQL
- Input validationData science
- Input validationServer-side JavaScript
- Input validationPHP
- Input variablesCloud and DevOps
- input() and output()Front-end
- INSERT ... ON CONFLICTSQL
- INSERT, UPDATE, DELETEPHP
- Installation and structurePHP
- Installing WordPressWebsites and CMS
- Integration testsBack-end
- Interactions and polynomialsData science
- Interactions between visualsPower BI
- Interactive prototypeCross-functional skills
- InterfacesPHP
- InterfacesJava
- Interfaces and routesCloud and DevOps
- Interfaces and type aliasesFront-end
- Intermediate management balancesBusiness analytics
- Internal DNSCloud and DevOps
- Internal rolesGenerative AI
- Interquartile rangeStatistics
- INTERSECT and EXCEPTSQL
- Interviews and workshopsCross-functional skills
- Invalid model outputsGenerative AI
- Inventory coverageBusiness analytics
- Inventory turnoverBusiness analytics
- INVEST criteriaCross-functional skills
- is_incremental and thisData engineering
- Isolation between organizationsGenerative AI
- Iterating with foreachPHP
- IterationGenerative AI
- IterationCross-functional skills
- IteratorsPower BI
J
- JavaScript primitive typesFront-end
- JestBack-end
- JinjaData engineering
- Jinja templatesData engineering
- JiraCross-functional skills
- Job diagnosisData engineering
- Job outputsCloud and DevOps
- JobsPHP
- Jobs, stages, and tasksData engineering
- Join validationPython
- JoinsPython
- JPA (Jakarta Persistence)Java
- JPA relationshipsJava
- JPQL and @QueryJava
- JSONFront-end
- JSON bodies and Content-TypeBack-end
- JSON deserializationMobile
- JSON extractionData analysis
- json modulePython
- JSON responses and fetchPython for the web
- JSON serialization with JacksonJava
- JSON-LD and schema.orgFront-end
- JSONBSQL
- JSXFront-end
- Judge modelGenerative AI
- Judge-human agreementGenerative AI
- Junction tableSQL
- JUnit 6 (Jupiter)Java
- JUnit assertionsJava
- JUnit lifecycleJava
K
- K-meansData science
- k-nearest neighborsData science
- KanbanCross-functional skills
- KEEPFILTERSPower BI
- Key indicatorsPower BI
- Key messageData analysis
- Key-based SSHCloud and DevOps
- Keyboard navigationFront-end
- keyof and indexed typesFront-end
- Keys and uniquenessPower BI
- Keyset paginationSQL
- KPI definitionData analysis
L
- Labels and selectorsCloud and DevOps
- LagData science
- Lag and calendar featuresData science
- LAG and LEADSQL
- LakehousePower BI
- LakehouseData engineering
- Lambda functionsPython
- Lambdas and functional interfacesJava
- Language model (LLM)Foundations
- Language model (LLM)Generative AI
- Laravel SanctumPHP
- Laravel testingPHP
- Large language modelData science
- Lasso (L1)Data science
- Last row detectionExcel
- Latency and percentilesGenerative AI
- Layered architectureServer-side JavaScript
- Layered architectureJava
- Layers and cacheBack-end
- LayoutPower BI
- LayoutMobile
- Lazy evaluationData engineering
- Lazy loadingJava
- Lazy loadingFront-end
- Least privilegeCloud and DevOps
- LEFT JOINSQL
- Legal basesCross-functional skills
- LET functionExcel
- LicensesPower BI
- Lifecycle hooksFront-end
- Lifting state upFront-end
- Lighthouse audit and manual testsFront-end
- LIMITSQL
- Line-based placementFront-end
- LineageData engineering
- Lineage and selectionData engineering
- Linear regressionData science
- LinesPython
- Lint and coverageCloud and DevOps
- List and ArrayListJava
- List comprehensionsPython
- List-format dataExcel
- ListsFoundations
- ListsPython
- Lists and keysFront-end
- Lists ul, ol, liFront-end
- ListView.builderMobile
- LLM evaluationData science
- Load optionsExcel
- LoadingData analysis
- loc and ilocPython
- Local storageFront-end
- Local valuesCloud and DevOps
- LocalBusiness structured dataWebsites and CMS
- Location and cameraMobile
- Log rotationCloud and DevOps
- loggingPython
- LoggingData analysis
- LoggingBack-end
- Logical dateData engineering
- Logical functionsPower BI
- Logical operatorsJava
- Logical order of executionSQL
- Logistic regressionData science
- LogsCloud and DevOps
- LoopsFront-end
- LoopsPHP
- LoopsJava
- LoRA / PEFTData science
- Loss functionData science
M
- M languagePower BI
- Machine learningData science
- Macro recorderExcel
- Macro securityExcel
- Macro-enabled workbookExcel
- MacrosData engineering
- MAE, RMSE, R²Data science
- Managed containersCloud and DevOps
- Managed databasesCloud and DevOps
- Map (HashMap, TreeMap)Java
- Marginal returnBusiness analytics
- Marketing dashboardBusiness analytics
- Marketing data grainBusiness analytics
- Mass assignmentPHP
- MaterializationsData engineering
- Maturity and censored dataBusiness analytics
- MeanStatistics
- MeasuresPower BI
- Media libraryWebsites and CMS
- Media queriesFront-end
- MedianStatistics
- melt and pivotPython
- MergeFoundations
- Merge queriesPower BI
- Messages and rolesGenerative AI
- MetadataFront-end
- MethodsPython
- MethodsJava
- Metric treeData analysis
- MetricsCloud and DevOps
- Metrics and monitoringCloud and DevOps
- MiddlewareServer-side JavaScript
- Middleware orderServer-side JavaScript
- MigrationsPython for the web
- MigrationsPHP
- Minimum detectable effectStatistics
- Missing data mechanismsData science
- Missing value indicatorData science
- Missing valuesData analysis
- Missing valuesPython
- Mobile layoutPower BI
- MockitoJava
- MockMvc testsJava
- ModeStatistics
- ModelData engineering
- Model artifactData science
- Model complexityData science
- Model limitationsGenerative AI
- Model provenanceGenerative AI
- Model readabilityPower BI
- Model registryData science
- Model server APIGenerative AI
- Model structureExcel
- Model testsData science
- Model-based selectionData science
- Modeling workflowData science
- ModelsPython for the web
- Modifying the DOMFront-end
- Module registryCloud and DevOps
- ModulesServer-side JavaScript
- ModulesCloud and DevOps
- Modules and importsPython
- MonitoringData science
- Monitoring and alertsData engineering
- Monitoring dashboardGenerative AI
- MoSCoW methodCross-functional skills
- Mounted filesCloud and DevOps
- Moving averageSQL
- Moving averagePower BI
- Moving averageBusiness analytics
- Moving from Excel to Power BIExcel
- MOYENNE.SI.ENSExcel
- Multi-factor authenticationCloud and DevOps
- Multi-factor authenticationCross-functional skills
- Multi-horizon strategiesData science
- Multi-stage buildBack-end
- Multilayer perceptronData science
- Multiple aggregationsPython
- Multiple comparisonsStatistics
- Multiple fact tablesPower BI
- Multiple joinsSQL
- MVCC, VACUUM and autovacuumSQL
N
- N+1 problemSQL
- N+1 problemPHP
- N+1 problemJava
- Name resolutionCloud and DevOps
- Name, address, phone consistencyWebsites and CMS
- Named areasFront-end
- NamespacesPHP
- NamespacesCloud and DevOps
- Narrative structureData analysis
- Narrow and wide transformationsData engineering
- Native componentsMobile
- Native form validationFront-end
- Navigating between screensPower Platform
- NavigationFoundations
- NavigationMobile
- Navigation guardsFront-end
- Navigation menusWebsites and CMS
- NB.SI.ENSExcel
- ndarray arraysPython
- Nested cross-validationData science
- Nested layoutsFront-end
- Nested SIExcel
- Network callsMobile
- Network exposureGenerative AI
- New and returning customersBusiness analytics
- nn.ModuleData science
- node:testBack-end
- Node.js runtimeServer-side JavaScript
- Normal distributionStatistics
- NormalizationData analysis
- Normalization (BatchNorm, LayerNorm)Data science
- NOT NULL, UNIQUE, CHECK, DEFAULTSQL
- NotebooksPower BI
- NotificationsMobile
- npm and package.jsonServer-side JavaScript
- NTILESQL
- NULL and aggregatesSQL
- Null safetyMobile
- Number formatsExcel
- Numerical transformationsData science
O
- Object designJava
- Object lifecycleCloud and DevOps
- Object storageCloud and DevOps
- Object-level access controlPython for the web
- Object-level securityPower BI
- ObjectsFront-end
- Objects and referencesJava
- OData filter queriesPower Platform
- Office Scripts and Power AutomateExcel
- Office Scripts and the main functionExcel
- Offline modeMobile
- OIDC federationCloud and DevOps
- OllamaGenerative AI
- Ollama ModelfileGenerative AI
- OLTP and OLAPSQL
- ON DELETE CASCADE / RESTRICT / SET NULLSQL
- One-hot encodingData science
- OneDrive and SharePoint filesPower Platform
- OneLakePower BI
- Online reputationWebsites and CMS
- Open GraphFront-end
- OpenAPI documentationPython for the web
- openpyxl formattingPython
- Operational indicatorsGenerative AI
- OperatorsData engineering
- Operators and comparisonsFront-end
- Optimistic lockingJava
- Optimizer (SGD, Adam)Data science
- OptionalJava
- OrchestrationData analysis
- ORDER BYSQL
- Order lifecycleWebsites and CMS
- Order value distributionBusiness analytics
- Ordering and holding costsBusiness analytics
- Ordinal encodingData science
- Organizing foldersPython
- OTIFBusiness analytics
- Outbound data transferCloud and DevOps
- OutliersStatistics
- OutliersPython
- Outlook connectorPower Platform
- OutputsCloud and DevOps
- OVER clauseSQL
- OverfittingData science
- OverloadingJava
- OWASP Top 10Back-end
- Owner and data stewardData engineering
- Owner, group, umask, setgidCloud and DevOps
- Owning side and mappedByJava
P
- p-valueStatistics
- Page optimizationWebsites and CMS
- Page organizationPower BI
- Page tooltipsPower BI
- Pages and postsWebsites and CMS
- PaginationPython
- PaginationPython for the web
- PaginationJava
- pandas output (set_output)Data science
- pandas typesData analysis
- Parameterized queriesBack-end
- Parameterized testsJava
- Partial indexSQL
- PARTITION BYSQL
- Partition pruningData engineering
- Partitioned writesData engineering
- PartitioningData engineering
- PartitionsData engineering
- Password hashingBack-end
- Password managerCross-functional skills
- PasswordsCross-functional skills
- Patch and RemovePower Platform
- Path operations (routes)Python for the web
- Path parametersPython for the web
- pathlibPython
- PathsServer-side JavaScript
- Pattern matchingJava
- Payment methodsWebsites and CMS
- Payment termsBusiness analytics
- PBIP format and GitPower BI
- PDOPHP
- Pearson correlationStatistics
- PeekingStatistics
- Per-environment configurationPython for the web
- Per-environment variable filesCloud and DevOps
- Per-user authorizationServer-side JavaScript
- Performance and cachingWebsites and CMS
- Performance optimizationFront-end
- Period-over-period changeSQL
- PermalinksWebsites and CMS
- PermissionsFoundations
- PermissionsPython for the web
- PermissionsMobile
- Permutation importanceData science
- Persistence contextJava
- PersonaCross-functional skills
- Personal dataData engineering
- Personal dataCross-functional skills
- PestPHP
- pg_stat_statementsSQL
- pgvectorGenerative AI
- PhishingCross-functional skills
- Pinia storesFront-end
- PipelineData science
- PipesFoundations
- Pivot tableData analysis
- Pivot tablesPython
- PivotChartExcel
- PivotTableExcel
- PivotTable dashboardExcel
- Plan fileCloud and DevOps
- Plan nodes (Seq Scan, Index Scan, Hash Join...)SQL
- Planner statisticsSQL
- PlanningGenerative AI
- Plotly ExpressPython
- PluginsWebsites and CMS
- PodDisruptionBudgetCloud and DevOps
- PodsCloud and DevOps
- Point-in-time joinData engineering
- Poke and reschedule modesData engineering
- Policies and GatePHP
- PolymorphismPHP
- PolymorphismJava
- Population stability indexGenerative AI
- Population Stability IndexData science
- Ports and listeningCloud and DevOps
- PositioningFront-end
- PostgreSQL typesSQL
- Power Apps StudioPower Platform
- Power BI appsPower BI
- Power BI Desktop interfacePower BI
- Power BI ecosystemPower BI
- Power Fx languagePower Platform
- Power PivotExcel
- Power Query best practicesPower BI
- Power Query editorPower BI
- Power Query in ExcelExcel
- Preattentive attributesData analysis
- Precision and recallData science
- Precision-recall curveData science
- Predicted probabilitiesData science
- Prepared statementsPHP
- Preventing XSS vulnerabilitiesFront-end
- Price effect and volume effectBusiness analytics
- Primary keySQL
- Primary key and foreign keySQL
- Primary metric and guardrailsStatistics
- Primitive types and StringJava
- Principal component analysisData science
- Principles and framework (WCAG, RGAA)Front-end
- Prior-year comparisonPower BI
- PrioritizationData engineering
- Private database connectionCloud and DevOps
- ProbabilityStatistics
- ProblemDetailJava
- Processes and PIDCloud and DevOps
- ProcessingCross-functional skills
- ProcessorsCross-functional skills
- Product BacklogCross-functional skills
- Product co-occurrenceBusiness analytics
- Product pageWebsites and CMS
- Production buildServer-side JavaScript
- Production buildFront-end
- Production securityPython for the web
- Professional equality frameworkBusiness analytics
- Program structureJava
- Progress chartCross-functional skills
- Project and appsPython for the web
- Project architecturePython for the web
- Promise chainingFront-end
- Promise.allFront-end
- Promise.allSettledFront-end
- Promise.race and Promise.anyFront-end
- PromisesFront-end
- PromisesServer-side JavaScript
- Prompt writingFoundations
- PropsFront-end
- Props and childrenFront-end
- Protected routesServer-side JavaScript
- Provider and deployerGenerative AI
- ProvidersCloud and DevOps
- Providers and scopeFront-end
- Pruning and columnar formatsData engineering
- Pseudo-classesFront-end
- Pseudo-elementsFront-end
- PseudocodeFoundations
- PseudonymizationBusiness analytics
- Pseudonymization and anonymizationData engineering
- PSR-4 autoloadingPHP
- Public, private, hybrid cloudCloud and DevOps
- PublishingPower BI
- Publishing a Flutter appMobile
- Publishing a React Native appMobile
- Publishing calendarWebsites and CMS
- Pull requestFoundations
- push, pull, fetch, cloneFoundations
- Pydantic modelsPython for the web
- PySparkPower BI
Q
- Quality diagnosisPython
- Quality dimensionsData engineering
- Quality indicatorsData engineering
- Quality rulesData engineering
- Quality, cost, latency trade-offGenerative AI
- QuantilesStatistics
- QuantizationGenerative AI
- QuarantineData analysis
- Query logData engineering
- Query optimizationData engineering
- Query parametersPython for the web
- Query parametersExcel
- Query readabilitySQL
- query() and PDOStatementPHP
- QuerySet and lookupsPython for the web
- Queue (FIFO)Foundations
- QueuesPHP
R
- RAG evaluationData science
- Random forestData science
- RandomizationStatistics
- RANKX and TOPNPower BI
- RansomwareCross-functional skills
- Rate limits and retriesGenerative AI
- Ratio metricsStatistics
- Reactive formsFront-end
- Reactivity (ref, reactive)Front-end
- Reading and writing ExcelPython
- Reading and writing filesPython
- Reading CSV filesPython
- Reading filesFoundations
- Readonly propertiesPHP
- Recall@k and precision@kGenerative AI
- RECHERCHEVExcel
- RECHERCHEXExcel
- Reciprocal rank fusion (RRF)Generative AI
- Recoding valuesPython
- RecommendationData analysis
- Record of processingCross-functional skills
- RecordsJava
- RedirectionsFoundations
- ReductionJava
- Reference forecastData science
- Reference test setGenerative AI
- RefreshPower BI
- RefreshingExcel
- RegionsCloud and DevOps
- Regression testingGenerative AI
- RegularizationData science
- RELATED and RELATEDTABLEPower BI
- RelationshipsPower BI
- RelationshipsPHP
- Relative estimationCross-functional skills
- Relative referencesExcel
- Release buildsMobile
- ReleasesCloud and DevOps
- Remote repositoryFoundations
- Removing duplicatesPython
- render and contextPython for the web
- Reorder pointBusiness analytics
- repartition and coalesceData engineering
- Replenishment policy (s, Q)Business analytics
- Report connectionsExcel
- Report themesPower BI
- Repository patternPHP
- ReproducibilityData science
- Repurchase within a windowBusiness analytics
- Request → Response handlersBack-end
- Request and responsesPHP
- Request bodyPython for the web
- Request cancellationServer-side JavaScript
- Request mappingsJava
- Request statesServer-side JavaScript
- Requests and limitsCloud and DevOps
- RerankingGenerative AI
- ResamplingData science
- Resource organizationCloud and DevOps
- Resource routesPHP
- Responding to reviewsWebsites and CMS
- Response modelPython for the web
- Response objectFront-end
- Response streamingGenerative AI
- ResponseEntity and HTTP status codesJava
- Responsible useFoundations
- Responsive designFront-end
- Responsive imagesFront-end
- REST principlesBack-end
- RetentionData analysis
- Retention matrixBusiness analytics
- Retention periodData engineering
- Retention periodsCross-functional skills
- RetrainingData science
- RetriesData analysis
- Retries and exponential backoffGenerative AI
- Retrieval-Augmented GenerationData science
- RetrospectiveCross-functional skills
- RETURNINGSQL
- RevalidationFront-end
- RevenueData analysis
- Revenue per visitBusiness analytics
- Reverse proxy and HTTPSBack-end
- Reviewing generated codeFoundations
- Revisions and trafficCloud and DevOps
- RFM segmentationBusiness analytics
- RICE score and value/effortCross-functional skills
- Rich resultsFront-end
- Ridge (L2)Data science
- RIGHT and FULL JOINSQL
- Right of withdrawalWebsites and CMS
- Risk control measuresGenerative AI
- Risk levelsGenerative AI
- ROAS and ROIData analysis
- ROC curve and AUCData science
- RollbackCloud and DevOps
- Rolling update and rollbackCloud and DevOps
- Rolling windowsData science
- Root cause analysisData engineering
- Route guardsFront-end
- Route HandlersFront-end
- RoutingBack-end
- RoutingServer-side JavaScript
- RoutingPHP
- RoutingGenerative AI
- Routing and escalationGenerative AI
- Row contextPower BI
- ROW_NUMBER, RANK, DENSE_RANKSQL
- Row-level securityPower BI
- ROWS BETWEEN frameSQL
- Rows, Columns, Values, Filters areasExcel
- Running totalSQL
- Running totalPower BI
- RxJS observablesFront-end
- RxJS operatorsFront-end
S
- Safe joinsData analysis
- Safety and idempotencyBack-end
- Safety stockBusiness analytics
- Sales metricsWebsites and CMS
- Sample ratio mismatchStatistics
- Sample sizeStatistics
- SamplingStatistics
- Sargable conditionsSQL
- Scalar subquerySQL
- Scatter plots and box plotsPython
- SCD type 2Data engineering
- Scenario Manager and data tableExcel
- Scheduled refreshPower BI
- SchedulingPython
- Scheduling (cron, presets)Data engineering
- Schema and file readingData engineering
- Schema migrationsSQL
- Schema validationGenerative AI
- scikit-learn transformerData science
- Scope and closuresFront-end
- Scope and pass-by-valueJava
- Script structurePython
- ScrumCross-functional skills
- Scrum eventsCross-functional skills
- Sealed typesJava
- Search ConsoleWebsites and CMS
- Searching with grepFoundations
- Secret managerCloud and DevOps
- SecretsCloud and DevOps
- Secrets and variablesCloud and DevOps
- Secure cookiesBack-end
- Secure sharingCross-functional skills
- Secure storageMobile
- SecurityWebsites and CMS
- Security headersBack-end
- Security in FabricPower BI
- Security incidentCross-functional skills
- Security of generated codeFoundations
- SegmentationData science
- SELECT and FROMSQL
- Selecting elementsFront-end
- Self-joinSQL
- Semantic HTML and landmarksFront-end
- Semantic searchData science
- Semantic structural elementsFront-end
- Semantic versioningServer-side JavaScript
- SensorsData engineering
- Sequential or concurrentFront-end
- SerializationData science
- SeriesPython
- Series generationSQL
- Server ActionsFront-end
- Server and Client ComponentsFront-end
- Server-Sent EventsGenerative AI
- Server-side data loadingFront-end
- Server-side rendering (SSR)Front-end
- Server-side securityFront-end
- Service accountsCloud and DevOps
- Service containersCloud and DevOps
- Service equivalencesCloud and DevOps
- Service identitiesCloud and DevOps
- Service levelBusiness analytics
- Service level (SLA)Data engineering
- ServicesCloud and DevOps
- ServicesFront-end
- SessionsBack-end
- SessionsServer-side JavaScript
- SetFoundations
- Set (HashSet, TreeSet)Java
- SetsPython
- setTimeoutFront-end
- Shared responsibilityCloud and DevOps
- Shared stateMobile
- SharePoint connectorPower Platform
- Sheet protectionExcel
- Shipping zones and methodsWebsites and CMS
- SI.CONDITIONSExcel
- SIERREUR and SI.NON.DISPExcel
- SignalsCloud and DevOps
- Signals (signal, computed)Front-end
- Signed tokens (JWT)Back-end
- SigningMobile
- Silhouette scoreData science
- Similarity and distancesGenerative AI
- Simple recommendationBusiness analytics
- Simpson's paradoxData analysis
- Single-file components (SFC)Front-end
- Singular testsData engineering
- Site editorWebsites and CMS
- Skeleton of an HTML documentFront-end
- Skew and saltingData engineering
- SkewnessData analysis
- SLA and composite availabilityCloud and DevOps
- SlicersPower BI
- SlicersExcel
- Slots and provide / injectFront-end
- Slowly changing dimensionsData engineering
- SMART objectivesData analysis
- SnapshotsData engineering
- Social engineeringCross-functional skills
- Social mediaWebsites and CMS
- SOMME, MOYENNE, MIN, MAX, NBExcel
- SOMME.SI.ENSExcel
- SortingFoundations
- SortingPython
- SortingExcel
- SourceData engineering
- SOUS.TOTALExcel
- SPA fallbackServer-side JavaScript
- Space complexityFoundations
- Spark DataFrameData engineering
- Spark SQLPower BI
- Spark SQLData engineering
- SparkSessionData engineering
- Special methodsPython
- Specification by exampleFoundations
- SpecificityFront-end
- Split a columnPower BI
- Spring BootJava
- Spring container and beansJava
- Spring Data JPAJava
- SQL extractionData analysis
- SQL injectionBack-end
- SQL injectionPHP
- SQL paginationPHP
- Stack (LIFO)Foundations
- Stacking and z-indexFront-end
- Staging areaFoundations
- StakeholdersCross-functional skills
- Standalone componentsFront-end
- Standard deviationStatistics
- Standard errorStatistics
- Standard libraryPython
- StandardizationData science
- Star schemaSQL
- Star schemaPower BI
- State and renderingFront-end
- State file and backendCloud and DevOps
- StatefulWidget and setStateMobile
- StatelessWidgetMobile
- static membersJava
- Static membersPHP
- Static rendering and ISRFront-end
- StationarityData science
- Statistical powerStatistics
- Status codesBack-end
- Stock managementWebsites and CMS
- StockoutBusiness analytics
- Stop conditionsGenerative AI
- Storage modesPower BI
- Store dashboardBusiness analytics
- storeToRefsFront-end
- StreamsServer-side JavaScript
- StreamsJava
- Strict mode and tsconfigFront-end
- String and StringBuilderJava
- StringsPHP
- Structural chunkingGenerative AI
- Structured dataFront-end
- Structured errors (Problem Details)Back-end
- Structured logsCloud and DevOps
- Structured outputsGenerative AI
- Structured referenceExcel
- Structured referencesExcel
- Structured tableExcel
- Student's t distributionStatistics
- StyleSheet and FlexboxMobile
- Subject and BehaviorSubjectFront-end
- SubplotsPython
- SubscriptionsPower BI
- sudo and rootCloud and DevOps
- Suitable use casesGenerative AI
- Summary and display of valuesExcel
- Supplier lead timeBusiness analytics
- Support, confidence and liftBusiness analytics
- Surrogate keyData engineering
- switch expressionsJava
- System errorsServer-side JavaScript
- systemd journalCloud and DevOps
- systemd servicesCloud and DevOps
- systemd timersCloud and DevOps
T
- t-SNEData science
- t-testStatistics
- Table aliasesSQL
- Table functionsPower Platform
- Tags, elements and attributesFront-end
- Target encodingData science
- Task dependenciesData engineering
- TaskFlow APIData engineering
- Taxes and tax-inclusive pricesWebsites and CMS
- Teams and SharePoint integrationPower BI
- Technical SEOFront-end
- Template inheritancePython for the web
- Template syntaxFront-end
- Template-driven formsFront-end
- TemplatesPython for the web
- Templates and control flow blocksFront-end
- Temporary views and tablesData engineering
- TensorData science
- Tenure and early departuresBusiness analytics
- Terminal and shellFoundations
- Terraform environmentsCloud and DevOps
- Terraform in continuous integrationCloud and DevOps
- Test doublesBack-end
- Test doublesJava
- Test hooksBack-end
- Test isolationJava
- Test pyramidBack-end
- Test severityData engineering
- Test-Driven DevelopmentBack-end
- Testing Express APIsServer-side JavaScript
- Testing NULL with IS NULLSQL
- Testing with test doublesPython
- Testing with Vitest and Vue Test UtilsFront-end
- Tests with TestClientPython for the web
- Text alternativesFront-end
- Text classificationData science
- Text elementsFront-end
- Text functionsExcel
- Text normalizationData science
- Text standardizationPython
- Text transformationsPower BI
- Text with .strPython
- TF-IDFData science
- The $_GET and $_POST superglobalsPHP
- The DOM treeFront-end
- The http moduleServer-side JavaScript
- The init, plan, apply, destroy cycleCloud and DevOps
- The match expressionPHP
- The N+1 problemPython for the web
- The next functionServer-side JavaScript
- The Object classJava
- The process objectServer-side JavaScript
- The pyramid principleData analysis
- The ref functionData engineering
- The requests libraryPython
- The SI functionExcel
- The TEXTE functionExcel
- ThemesPower BI
- ThemesWebsites and CMS
- Throughput and latencyGenerative AI
- Time complexityFoundations
- Time intelligencePower BI
- Time to fillBusiness analytics
- Time-based featuresData science
- Time-based splitData science
- TimelineExcel
- Title and meta descriptionFront-end
- Titles and labelsExcel
- Titles, labels and legendPython
- TLS terminationCloud and DevOps
- to_datetimePython
- to_numericPython
- Token costGenerative AI
- Token permissionsCloud and DevOps
- TokenizationData science
- Tool calls (function calling)Generative AI
- Tool securityGenerative AI
- Tool-response loopGenerative AI
- Tools and schemasGenerative AI
- Top N per groupSQL
- Top N with LIMIT and OFFSETSQL
- Train/test splitData science
- Training loopData science
- TraitsPHP
- TransactionsServer-side JavaScript
- TransactionsPHP
- Transfer learningData science
- TransformationData analysis
- Transformations and actionsData engineering
- Transformer architectureData science
- TransitionsFront-end
- TransparencyGenerative AI
- Transparency of useGenerative AI
- TreesFoundations
- TrelloCross-functional skills
- Trigger rulesData engineering
- TriggersPower Platform
- TriggersCloud and DevOps
- Troubleshooting methodCloud and DevOps
- Truthy and falsy valuesFront-end
- try-with-resourcesJava
- Try/Catch scopesPower Platform
- try/except exceptionsPython
- TuplesPython
- Turnover rateBusiness analytics
- Twelve-factor appBack-end
- Two-proportion z-testStatistics
- Type annotationsPython
- Type conversionPython
- Type guardsFront-end
- Type inferenceFront-end
- Type narrowingFront-end
- Typed fetch clientFront-end
- Types and localePower BI
- Types of learningData science
- TypeScript primitive typesFront-end
- Typing and strict_typesPHP
- TypographyFront-end
U
- UDFs and pandas UDFsData engineering
- ufw firewallCloud and DevOps
- Undo (restore, revert, reset)Foundations
- UNION and UNION ALLSQL
- Unions and literal typesFront-end
- unique_key and strategiesData engineering
- Unit fileCloud and DevOps
- Unit testsJava
- Units of measurementFront-end
- Univariate analysisData analysis
- UnpivotPower BI
- Update anomaliesSQL
- UpdatesCross-functional skills
- UpliftStatistics
- UpsertData analysis
- URL designBack-end
- URL routingPython for the web
- URL structureBack-end
- Usability metrics and SUSCross-functional skills
- Use of colorPower BI
- Use-case auditGenerative AI
- useActionState and useFormStatusFront-end
- useEffectFront-end
- useOptimisticFront-end
- User feedbackGenerative AI
- User flowCross-functional skills
- User interviewCross-functional skills
- User journey mapCross-functional skills
- User researchCross-functional skills
- User rolesWebsites and CMS
- User storiesCross-functional skills
- User storyCross-functional skills
- User testCross-functional skills
- useReducerFront-end
- Users and groupsCloud and DevOps
- useStateFront-end
- Utility typesFront-end
- UTM parametersWebsites and CMS
- UTM parametersBusiness analytics
V
- v-model on a componentFront-end
- ValidationPHP
- Validation and learning curvesData science
- Validation errorsServer-side JavaScript
- ValidatorsFront-end
- Variable importanceData science
- Variable scopeFoundations
- Variable typesStatistics
- VariablesFoundations
- VariablesPython
- VariablesPower BI
- VariablesPower Platform
- Variables (const, let)Front-end
- Variables and collectionsPower Platform
- Variables and typesPHP
- Variables and typesExcel
- Variables and typesMobile
- VarianceStatistics
- Variance analysisBusiness analytics
- Vectorized computationPython
- VelocityCross-functional skills
- Verifying answersGenerative AI
- Version and build numberMobile
- Version matrixCloud and DevOps
- ViewsSQL
- ViewsPython for the web
- Virtual environments and pipPython
- Visual accessibilityCross-functional skills
- Visual Basic EditorExcel
- Visual formattingPower BI
- VitestBack-end
- vLLMGenerative AI
- VolumesBack-end
- Vue RouterFront-end
W
- Walking hierarchiesSQL
- WarehousePower BI
- Warehouse costsData engineering
- Watermark and incremental loadingData analysis
- Weight decayData science
- Welch's testStatistics
- WHERE clauseSQL
- WidgetsMobile
- Wildcards (globbing)Foundations
- Window functionsPower BI
- Window functionsData engineering
- WireframeCross-functional skills
- WITH RECURSIVESQL
- Workbook, sheets and cellsExcel
- WorkersPHP
- WorkflowsGenerative AI
- Working memory and long-term memoryGenerative AI
- Workspace rolesPower BI
- WorkspacesPower BI
- WorkspacesCloud and DevOps
- Writing promptsGenerative AI
X
- XComData engineering
Y
- Year-end forecastBusiness analytics
- Year-over-year comparisonData analysis
- Year-to-date (YTD)Power BI
- Year-to-date totalBusiness analytics
#
- .gitignoreFoundations
- @CsvSourceJava
- @DataJpaTestJava
- @Nested and @DisplayNameJava
- @PathVariable, @RequestParam, @RequestBodyJava
- @RestControllerJava
- @RestControllerAdvice et @ExceptionHandlerJava
- @TransactionalJava
- /var/log filesCloud and DevOps
- 1NF, 2NF, 3NFSQL