Multiple choice technology mainframe

subqueries cannot have union

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In DB2 and many other SQL implementations, subqueries cannot directly contain UNION operations. This is a syntax restriction. To combine results from multiple queries within a subquery, you would typically need to use alternative approaches like UNION ALL in a derived table or restructure the query.

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