SQL for Data Engineers
SQL is the fastest way to access data, but bad SQL can slow down even the fastest database.
Choose your preferred database:
  • Data Engineering Concepts
    • SQL Techniques
      • Performance of DML
        • DELETE - remove existing rows
        • INSERT - add new rows
      • ASOF JOIN
      • Generate rows
      • Hash Functions
      • QUALIFY
    • SQL for Staging Layer
      • SQL for PSA
    • SQL for Data Vault
      • SQL for Dimensional Models
        • SQL for fact tables
        • SQL for dimensions

      Performance of DML

      SQL features for BI/DWH

      • DELETE - remove existing rows
      • INSERT - add new rows
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