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PL-SQL - What is correlated sub-query?




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asked mar April 9, 2015 09:18 AM  

What is correlated sub-query?


           

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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. The subquery is evaluated once for each row processed by the outer query.

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