Discussion
A SELECT statement within another SELECT statement and enclosed in square brackets ([...]) is called a subquery.
Answer: B
Correct answer: False
A subquery is enclosed in ordinary parentheses, not square brackets: WHERE id IN (SELECT id FROM other).
The rest of the sentence is right - a subquery is indeed a SELECT nested inside another statement - so the single wrong detail is the delimiter. Square brackets do appear in SQL Server and Access, but to quote identifiers containing spaces or reserved words, as in [Order Details], which is an unrelated use.
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