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 script demonstrates various subquery techniques in SQL. It covers result types, subqueries in the FROM clause, in SELECT, with comparison operators, IN, ANY, correlated subqueries, and EXISTS.

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 ...