Using a Pass-Through Query in a Subquery The next example shows how to use a subquery that contains a Pass-Through query. A subquery is a nested query and is usually part of a WHERE or HAVING clause.

How does sql process a statement containing sub-query? Question: Find the employees who's salary is more than the average salary earned by all employees /* Find the average compare avg with outer ...

The subquery resolves by substituting every value for MARCH.Flight into the subquery's WHERE clause, one row at a time. For example, when MARCH.Flight= 219, the subquery resolves as follows: PROC SQL ...

I'm trying to assign rows in a table to a random variable entirely in Transact SQL (This is MS SQL Server 2000, sp3). I've got it working perfectly except I can't use a variable inside my subquery ...

The problem is that many database systems do not allow referencing a column alias from the inner query (average_salary) directly in the outer query's AVG function. This is because the database ...