I'm trying to port an application from SQL Server to MySQL (5.6.4) and running into performance issues. MySQL happens to be running on OS X Server, but this seems more like a UNIX question. SELECT ...

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 ...

This repository contains SQL subquery practice problems using an employeesales table. Each query is designed to help users understand how to apply subqueries in real-world business scenarios such as ...