SQL Tutorial #30 Using IN operator with subquery in SQL (With Example)

Description:
A subquery is a SQL query nested inside a larger query.

The subquery can be nested inside a SELECT, INSERT, UPDATE, or DELETE statement or inside another subquery.

A subquery is usually added within the WHERE Clause of another SQL SELECT statement.

The inner query executes first before its parent query so that the results of an inner query can be passed to the outer query.