Computer Science · Database Management Systems
When does a correlated subquery generally become slow and inefficient in execution?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1When the outer query has a large number of rows and is evaluated for each row✓
- 2When the subquery is executed only once for the entire outer query
- 3When the outer query contains only a single row
- 4When the inner subquery returns a very few rows
Correct answer
When the outer query has a large number of rows and is evaluated for each row
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