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 ...

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 ...

Now that you've seen how subqueries work, it's time to get some practice writing them! Not all of the queries will require subqueries, but all will be a bit more complex and require some thought and ...