Computer Science · Database Management Systems
How many times is the subquery executed in a typical correlated subquery execution?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Once before the outer query runs
- 2Once for each candidate row evaluated by the outer query✓
- 3Once after all rows of the outer query are evaluated
- 4Exactly twice for each join operation
Correct answer
Once for each candidate row evaluated by the outer query
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