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 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 ...

However, as the SAS log in SAS Log Comparing the Two PROC SQL Queries indicates, the PROC SQL query with the Pass-Through subquery performs better. (The STIMER option on the PROC SQL statement ...

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 ...