DA0-002 Data Concepts and Environments Practice Question
Network Topology
When the analyst runs the query, it fails. What is the most likely reason?
⚠ Common exam trap
CompTIA often tests the SQL query execution order, specifically that column aliases cannot be used in the WHERE clause, leading candidates to mistakenly think the alias is available everywhere in the query.
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
✓
The alias 'TotalValue' cannot be used in the WHERE clause.
The alias 'TotalValue' is defined in the SELECT clause but is referenced in the WHERE clause. In SQL, column aliases cannot be used in the WHERE clause because the WHERE clause is evaluated before the SELECT clause, so the alias does not yet exist at that point in the query execution order. This causes a syntax or 'unknown column' error.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The alias 'TotalValue' cannot be used in the WHERE clause.
Why this is correct
Aliases are not recognized in WHERE due to order of execution.
- ✗
The table name 'Products' is misspelled.
Why it's wrong here
It matches the exhibit.
- ✗
The data types of Price and Quantity are incompatible.
Why it's wrong here
Both are numeric, so compatible.
- ✗
The expression 'Price * Quantity' is invalid in SQL.
Why it's wrong here
Multiplication is valid.
Go deeper
Related to this question
About these practice questions
This DA0-002 question is part of Courseiva's 986-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 by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DA0-002 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 DA0-002 exam.