SQL (Structured Query Language) is the standard database management language across the web. Though there are several different database packages, MySQL being the most common, all of them use SQL as their foundation. Basically, if you want to access relational data from your application, regardless of package or scripting language, you are going to need to understand SQL.
This tutorial is meant to take a beginner SQL programmer from the most simple queries to something much more advanced. Since there are some differences in the ways that different packages handle SQL, we’re going to be using MySQL for these examples.
You can access the original tutorial blog at syntaxxx.com/moving-from-simple-to-complex-mysql-q…
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