DS0-001 Data Querying And Analysis Practice Question
A database administrator needs to ensure that a query calculating running totals is performant. Which window function clause is essential to order the calculation sequence?
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
✓
ORDER BY
The ORDER BY clause inside the OVER() function determines the sequence for running calculations.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
GROUP BY
Why it's wrong here
GROUP BY is not used within window function definitions.
- ✗
PARTITION BY
Why it's wrong here
PARTITION BY groups the data but does not define the order of calculation.
- ✗
ROWS BETWEEN
Why it's wrong here
ROWS BETWEEN defines the frame, not the sorting of the data.
- ✓
ORDER BY
Why this is correct
ORDER BY is required to define the sequential nature of a running total.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official CompTIA exam blueprint
This DS0-001 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DS0-001 exam.