DA0-002 Data Acquisition and Preparation Practice Question
A data analyst runs the query: SELECT AVG(salary) FROM employees GROUP BY department HAVING AVG(salary) > 60000. What is the purpose of the HAVING clause?
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
✓
It filters departments where the average salary exceeds $60,000.
HAVING filters groups after aggregation, unlike WHERE which filters rows before aggregation.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It orders departments by average salary descending.
Why it's wrong here
Ordering is done by ORDER BY.
- ✓
It filters departments where the average salary exceeds $60,000.
Why this is correct
HAVING filters groups based on aggregate conditions.
- ✗
It returns only the department with the maximum average salary.
Why it's wrong here
It returns all departments meeting the condition, not just max.
- ✗
It filters individual employee rows with salary > 60000 before grouping.
Why it's wrong here
That would be done by WHERE.
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