DA0-002 Data Concepts and Environments Practice Question
Network Topology
Refer to the exhibit. A data analyst runs this query to identify high-value customers. However, the result does not include customers with exactly 5 orders. Which data concept does the HAVING clause illustrate?
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
✓
Data aggregation with filtering on aggregated values
HAVING filters groups after aggregation, unlike WHERE which filters rows before aggregation. This demonstrates data aggregation with filtering on aggregated 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.
- ✗
Data sorting with ORDER BY
Why it's wrong here
ORDER BY sorts results; HAVING filters, not sorts.
- ✗
Data joining with INNER JOIN
Why it's wrong here
Joining combines tables; HAVING filters aggregated data.
- ✓
Data aggregation with filtering on aggregated values
Why this is correct
HAVING filters after GROUP BY, operating on aggregated results.
- ✗
Data filtering on row-level conditions
Why it's wrong here
Row-level filtering is done with WHERE, not HAVING.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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