WHAT IS AN SQL SUBQUERY?

Sumit Kesarwani

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  1. Sumit Kesarwani

    Post:782

    Points:3910
    What is an SQL subquery?

    An SQL subquery is a means of querying two or more tables at the same time. The subquery itself is an SQL SELECT statement contained within the WHERE clause of another SQL SELECT statement, and separated by being enclosed in parenthesis. Some subqueries have equivalent SQL join structures, but correlated subqueries cannot be duplicated by a join.

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