Computer Science · Database Management Systems
Why is the ORDER BY clause usually disallowed or ignored in subqueries by standard relational database engines unless accompanied by a TOP/LIMIT clause?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1A subquery defines an unordered relational set, so ordering has no effect on the final result structure✓
- 2It disrupts the physical execution order of the database query planner
- 3It directly violates the third normal form (3NF) of database design
- 4It always causes a fatal syntax error in all standard database dialects
Correct answer
A subquery defines an unordered relational set, so ordering has no effect on the final result structure
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