DA0-002 Data Acquisition and Preparation Practice Question
A data analyst needs to create a new column 'full_name' by concatenating 'first_name' and 'last_name' with a space. Which SQL function should be used in the SELECT clause?
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
✓
CONCAT(first_name, ' ', last_name)
CONCAT concatenates strings; in some DBMS, || or + is used, but CONCAT is standard.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
COMBINE(first_name, last_name)
Why it's wrong here
No such function.
- ✓
CONCAT(first_name, ' ', last_name)
Why this is correct
Correct: CONCAT joins strings.
- ✗
JOIN(first_name, last_name)
Why it's wrong here
No such function.
- ✗
first_name + ' ' + last_name
Why it's wrong here
Works in some DBMS but not standard SQL.
Go deeper
Related to this question
About these practice questions
Courseiva writes every DA0-002 question from scratch — 986 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 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.