Tests a specified table (normally a derived table) for the existence of at least one row (that is, it tests whether the table in question is non-empty).
EXISTS is supported as the predicate of the search condition in a WHERE clause.
Tests a specified table (normally a derived table) for the existence of at least one row (that is, it tests whether the table in question is non-empty).
EXISTS is supported as the predicate of the search condition in a WHERE clause.