DA0-002 Data Acquisition and Preparation Practice Question
A data analyst needs to retrieve all unique job titles from the employees table. Which SQL clause should be used with the SELECT statement?
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
✓
DISTINCT
The DISTINCT keyword is used to return only distinct (different) values.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
TOP
Why it's wrong here
TOP limits the number of rows returned.
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UNIQUE
Why it's wrong here
UNIQUE is not a valid SQL clause for this purpose.
- ✓
DISTINCT
Why this is correct
DISTINCT filters out duplicate rows.
- ✗
ORDER BY
Why it's wrong here
ORDER BY sorts results but does not remove duplicates.
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