hardMultiple ChoiceObjective-mapped
FC0-U71 Practice Question: A report requires data from two tables: Customers…
A report requires data from two tables: Customers and Orders. Which SQL clause is used to combine rows from both tables based on a related column?
⚠ Common exam trap
The FC0-U61 exam often tests the distinction between set operations (UNION, INTERSECT) and join operations, so the trap here is that candidates confuse UNION (which stacks rows) with JOIN (which combines columns from related tables).
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
✓
JOIN
The JOIN clause (specifically an INNER JOIN) is used to combine rows from two or more tables based on a related column between them, such as a foreign key. In this scenario, the Customers and Orders tables would typically be linked by a CustomerID column, and a JOIN allows you to retrieve data like customer names alongside their order details in a single result set.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
UNION
Why it's wrong here
UNION combines result sets vertically, not based on relationships.
- ✗
SUBQUERY
Why it's wrong here
A subquery is nested inside another query; it does not combine tables in the same way.
- ✓
JOIN
Why this is correct
JOIN merges rows from tables based on a condition, typically a foreign key.
- ✗
INTERSECT
Why it's wrong here
INTERSECT returns common rows from two queries, not a join.
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