DA0-002 Data Acquisition and Preparation Practice Question
A data analyst is using SQL to extract data. The analyst wants to retrieve all records from a table named 'sales' where the 'amount' column is greater than 100. Which SQL clause should be used?
⚠ Common exam trap
Watch out — candidates often confuse HAVING with WHERE, thinking both can filter rows, but HAVING is only valid after GROUP BY and for aggregate conditions, while WHERE filters individual rows before any grouping.
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
✓
WHERE
The WHERE clause in SQL is used to filter records based on a specified condition, such as 'amount > 100'. It is applied directly to the rows in the 'sales' table before any grouping or ordering, making it the correct choice for retrieving only records where the amount exceeds 100.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
WHERE
Why this is correct
WHERE clause filters rows based on a condition.
- ✗
ORDER BY
Why it's wrong here
ORDER BY is for sorting, not filtering.
- ✗
GROUP BY
Why it's wrong here
GROUP BY is for grouping rows.
- ✗
HAVING
Why it's wrong here
HAVING filters groups, not individual rows.
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