DA0-002 Data Acquisition and Preparation Practice Question
A data analyst uses the following query: SELECT department, AVG(salary) AS avg_salary FROM employees GROUP BY department HAVING AVG(salary) > 50000. What is the purpose of the HAVING clause in this query?
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
✓
To filter groups (departments) based on the average salary
HAVING filters groups after aggregation, similar to WHERE but for aggregated results.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
To ensure only departments with more than 50000 employees are shown
Why it's wrong here
HAVING uses aggregate results, not employee count.
- ✗
To filter individual employee records before grouping
Why it's wrong here
That is the role of WHERE.
- ✗
To sort departments by average salary
Why it's wrong here
Sorting is done with ORDER BY.
- ✓
To filter groups (departments) based on the average salary
Why this is correct
HAVING filters groups after GROUP BY.
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