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Which SQL practice in a dbt model best helps minimize warehouse costs?

easy📝 Syntax Q3 of 15
dbt - Performance Optimization
Which SQL practice in a dbt model best helps minimize warehouse costs?
ASelecting only required columns and filtering rows early
BUsing SELECT * to include all columns for flexibility
CJoining all related tables regardless of necessity
DRunning queries without any WHERE clause
Step-by-Step Solution
Solution:

  1. Step 1: Identify cost drivers

    Warehouse costs increase with data scanned and processed.

  2. Step 2: Apply best SQL practices

    Selecting only necessary columns and filtering rows early reduces data scanned.

  3. Final Answer:

    Selecting only required columns and filtering rows early -> Option A

  4. Quick Check:

    Less data scanned means lower cost [OK]
Quick Trick: Filter early and select only needed columns [OK]
Common Mistakes:
MISTAKES
  • Using SELECT * increases data scanned
  • Joining unnecessary tables adds cost
  • Not filtering data increases query size

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