DA0-002 Data Acquisition and Preparation Practice Question
A data analyst needs to count the number of orders placed by each customer, but only for customers who have placed more than 5 orders. Which SQL clause should be used to filter the aggregated results?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
HAVING
HAVING is used to filter groups after aggregation. The query would use GROUP BY customer_id, then HAVING COUNT(*) > 5.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
FILTER
Why it's wrong here
FILTER is not a standard SQL clause.
- ✓
HAVING
Why this is correct
Correct. HAVING filters aggregated results.
- ✗
WHERE
Why it's wrong here
WHERE filters rows before aggregation.
- ✗
LIMIT
Why it's wrong here
LIMIT restricts the number of rows returned, not filtering groups.
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