DS0-001 Data Querying And Analysis Practice Question
A data analyst is writing a SQL query to retrieve unique department names from the 'Employees' table. Which keyword should be utilized to ensure the results do not contain duplicate entries?
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
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DISTINCT
The DISTINCT keyword is used to return only unique values from a specific column.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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GROUP BY
Why it's wrong here
While GROUP BY can produce unique values, DISTINCT is the direct keyword for this purpose.
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DISTINCT
Why this is correct
DISTINCT effectively filters out duplicate rows in a result set.
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UNIQUE
Why it's wrong here
UNIQUE is a constraint, not a query keyword for selecting data.
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FILTER
Why it's wrong here
FILTER is not a standard SQL query clause for removing duplicates.
About these practice questions
Courseiva writes every DS0-001 question from scratch — 216 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or 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.