Data Warehousing and Business Intelligence

  1. Data Integration: ETL and ELT Processes
    1. ETL vs. ELT Approaches
      1. Traditional ETL Process
        1. Extract-Transform-Load Sequence
          1. Server-Based Processing
            1. Batch Processing Patterns
              1. On-Premise Implementation
              2. Modern ELT Process
                1. Extract-Load-Transform Sequence
                  1. In-Database Processing
                    1. Cloud-Native Approach
                      1. Scalability Advantages
                      2. Choosing Between ETL and ELT
                        1. Data Volume Considerations
                          1. Processing Power Requirements
                            1. Latency Requirements
                              1. Cost Factors
                            2. Data Extraction
                              1. Full Extraction Methods
                                1. Complete Data Refresh
                                  1. Use Cases and Limitations
                                    1. Performance Implications
                                      1. Scheduling Considerations
                                      2. Incremental Extraction Methods
                                        1. Change Detection Strategies
                                          1. Timestamp-Based Extraction
                                            1. Flag-Based Extraction
                                              1. Performance Benefits
                                              2. Change Data Capture
                                                1. Log-Based CDC
                                                  1. Trigger-Based CDC
                                                    1. Application-Based CDC
                                                      1. Real-Time Change Detection
                                                      2. Extraction Challenges
                                                        1. Source System Impact
                                                          1. Data Consistency Issues
                                                            1. Network and Connectivity
                                                              1. Error Handling
                                                            2. Data Transformation
                                                              1. Data Cleansing Operations
                                                                1. Duplicate Record Removal
                                                                  1. Missing Value Handling
                                                                    1. Data Format Standardization
                                                                      1. Invalid Data Correction
                                                                      2. Data Validation Processes
                                                                        1. Data Type Validation
                                                                          1. Range and Domain Checks
                                                                            1. Business Rule Validation
                                                                              1. Referential Integrity Checks
                                                                              2. Data Standardization
                                                                                1. Format Harmonization
                                                                                  1. Code Conversion and Mapping
                                                                                    1. Unit Standardization
                                                                                      1. Naming Convention Application
                                                                                      2. Data Integration and Consolidation
                                                                                        1. Multi-Source Data Merging
                                                                                          1. Conflict Resolution Strategies
                                                                                            1. Data Matching and Linking
                                                                                              1. Master Data Integration
                                                                                              2. Derived Data Creation
                                                                                                1. Calculated Fields
                                                                                                  1. Aggregation Operations
                                                                                                    1. Lookup Operations
                                                                                                      1. Complex Business Logic
                                                                                                    2. Data Loading
                                                                                                      1. Initial Load Strategies
                                                                                                        1. Bulk Loading Techniques
                                                                                                          1. Parallel Loading
                                                                                                            1. Performance Optimization
                                                                                                              1. Validation and Verification
                                                                                                              2. Incremental Loading
                                                                                                                1. Insert Operations
                                                                                                                  1. Update Operations
                                                                                                                    1. Upsert Strategies
                                                                                                                      1. Delete Handling
                                                                                                                      2. Loading Patterns
                                                                                                                        1. Truncate and Reload
                                                                                                                          1. Append-Only Loading
                                                                                                                            1. Merge-Based Loading
                                                                                                                              1. Partition-Based Loading
                                                                                                                              2. Load Scheduling and Orchestration
                                                                                                                                1. Batch Processing Windows
                                                                                                                                  1. Dependency Management
                                                                                                                                    1. Error Recovery Procedures
                                                                                                                                      1. Monitoring and Alerting
                                                                                                                                    2. ETL/ELT Tools and Technologies
                                                                                                                                      1. Traditional ETL Tools
                                                                                                                                        1. Enterprise ETL Platforms
                                                                                                                                          1. Feature Comparison
                                                                                                                                            1. Licensing Models
                                                                                                                                              1. Implementation Considerations
                                                                                                                                              2. Cloud-Based Integration Services
                                                                                                                                                1. Platform-as-a-Service Options
                                                                                                                                                  1. Serverless Integration
                                                                                                                                                    1. Auto-Scaling Capabilities
                                                                                                                                                      1. Cost Models
                                                                                                                                                      2. Open Source Solutions
                                                                                                                                                        1. Community-Driven Tools
                                                                                                                                                          1. Customization Capabilities
                                                                                                                                                            1. Support Considerations
                                                                                                                                                              1. Total Cost of Ownership
                                                                                                                                                              2. Custom Development Approaches
                                                                                                                                                                1. Programming Languages
                                                                                                                                                                  1. Framework Selection
                                                                                                                                                                    1. Maintenance Requirements
                                                                                                                                                                      1. Skill Requirements

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                                                                                                                                                                  3. Dimensional Data Modeling

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                                                                                                                                                                  5. Business Intelligence and Analytics Layer