DA0-002 Data Acquisition and Preparation Practice Question
In SQL, you want to retrieve all products whose names start with 'Pro'. Which WHERE clause should you use?
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
✓
WHERE product_name LIKE 'Pro%'
LIKE with pattern 'Pro%' matches strings starting with 'Pro' followed by any characters. '%Pro%' matches any string containing 'Pro', 'Pro_' matches 'Pro' plus one character, and 'Pro' is exact match.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
WHERE product_name LIKE '%Pro%'
Why it's wrong here
Leading and trailing percent signs match 'Pro' anywhere in the name, so 'MicroPro' and 'Approved' also qualify. It is tempting because LIKE with wildcards is the correct operator family, but anchoring the pattern with a trailing percent only, as in 'Pro%', restricts results to genuine prefixes.
- ✗
WHERE product_name LIKE 'Pro_'
Why it's wrong here
The underscore wildcard matches exactly one character, so 'Pro_' returns four-character names like 'Prod' or 'Pros', not every name beginning with 'Pro'. It is tempting because LIKE with wildcards is the right family of operator, but the correct pattern requires a percent sign to match any trailing characters.
- ✗
WHERE product_name = 'Pro'
Why it's wrong here
Equality matches only the literal string 'Pro', returning no rows for 'Product' or 'Processor'. It is tempting when the intent is an exact match, which would be correct for a lookup of a single known product name, but prefix retrieval needs pattern matching rather than exact comparison.
- ✓
WHERE product_name LIKE 'Pro%'
Why this is correct
LIKE with the wildcard 'Pro%' matches any product_name beginning with the literal characters Pro, since % represents zero or more trailing characters. Equality (=) would require an exact full-string match, failing the stem's prefix requirement.
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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.