SQL: Down and Dirty Welcome to SQL: Down and Dirty. This book, if you can call it one, is designed as a quick reference, goto book for the working SQL, or Network Administrator. If you are like me, you like to keep all of your reference material together and not in a hundred internet searches. This reference is intended for the working IT professional in real world scenarios without having to find what you are looking for within a sea of webpage advertising, or author’s filler material. To tell you anymore would contradict everything I just said.