DS0-001 Database Structures And SQL Practice Question
A user wants to add a new column to an existing table named 'Employees'. Which SQL statement should be executed?
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
✓
ALTER TABLE
The ALTER TABLE command is used to modify the structure of an existing table, such as adding a new 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.
- ✗
MODIFY TABLE
Why it's wrong here
MODIFY is not a standard SQL DDL command for structure changes.
- ✗
UPDATE TABLE
Why it's wrong here
UPDATE is used for modifying row data, not table structure.
- ✗
CREATE COLUMN
Why it's wrong here
CREATE COLUMN is not a valid SQL syntax.
- ✓
ALTER TABLE
Why this is correct
ALTER TABLE is the correct command to add a column.
About these practice questions
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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.