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Question

What is a correlated sub-query?

a.

An independent query that uses the correlation name of another independent query.

b.

A sub-query that uses the correlation name of an outer query

c.

A sub-query that substitutes the names of the outer query

d.

A sub-query that does not depend on its outer query’s correlation names

Posted under SQL DBMS

Answer: (b).A sub-query that uses the correlation name of an outer query

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Q. What is a correlated sub-query?