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Moreover, what is correlated subquery with example?

Correlated subquery. In a SQL database query, a correlated subquery (also known as a synchronized subquery) is a subquery (a query nested inside another query) that uses values from the outer query. Here is an example for a typical correlated subquery.

Subsequently, question is, how many times correlated subquery will get executed? A non-correlated subquery is executed only once and its result can be swapped back for a query, on the other hand, a correlated subquery executed multiple times, precisely once for each row returned by the outer query. SELECT MAX(Salary) from Employee where Salary NOT IN (10000).

Just so, what is the difference between subquery and correlated query?

A subquery is a select statement that is embedded in a clause of another select statement. A Correlated subquery is a subquery that is evaluated once for each row processed by the outer query or main query.

What is the difference between a correlated subquery and a non correlated subquery?

Main difference between Correlated and Noncorrelated subquery is that, Correlated subquery depends upon Outer query and can not execute by its own while in Noncorrelated subquery both outer query and inner query are independent to each other.