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Which of the following best describes a subtle data issue that advanced dbt tests can detect?

easy📝 Conceptual Q2 of 15
dbt - Advanced Testing
Which of the following best describes a subtle data issue that advanced dbt tests can detect?
AA missing column in the source table
BA null value in a required field
CA syntax error in the SQL model
DDuplicate rows with slight differences in non-key columns
Step-by-Step Solution
Solution:

  1. Step 1: Identify subtle data issues

    Subtle issues are those not obvious, like duplicates that differ slightly in some columns.

  2. Step 2: Match with options

    Missing columns, syntax errors, and nulls are basic issues, while duplicates with slight differences are subtle.

  3. Final Answer:

    Duplicate rows with slight differences in non-key columns -> Option D

  4. Quick Check:

    Subtle data issue = Slightly different duplicates [OK]
Quick Trick: Subtle issues often involve near-duplicates or inconsistent data [OK]
Common Mistakes:
MISTAKES
  • Confusing syntax errors with data issues
  • Thinking missing columns are subtle issues
  • Ignoring differences in non-key columns

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