DS0-001 Data Querying And Analysis Practice Question
You are debugging a SQL query that uses an aggregate function. You receive an error stating that a column in your SELECT list is not part of an aggregate or a GROUP BY clause. What is the cause?
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
✓
Missing column in GROUP BY
Standard SQL requires every non-aggregated column in the SELECT clause to be included in the GROUP BY clause to ensure deterministic 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.
- ✗
Missing WHERE clause
Why it's wrong here
A missing WHERE clause does not cause this specific grouping error.
- ✗
Incorrect join type
Why it's wrong here
Join types affect result sets but not the grouping rule.
- ✓
Missing column in GROUP BY
Why this is correct
Columns in SELECT that are not aggregated must be grouped.
- ✗
Using an alias in WHERE
Why it's wrong here
Aliases are generally not allowed in WHERE clauses, but this is a separate error.
About these practice questions
This DS0-001 question is part of Courseiva's 216-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
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.