Learn SQL in 21 Days

The goal of this book is to provide

a focused examination of each of these topics, covering the essential information

you need. Many of the topics in this book deserve a book in their own right. Because it is not possible,

given the available space, to cover every aspect of some of these subjects, the

chapters in this book explain only what is most necessary for you to gain a working

understanding of the technologies they describe. Often, you will find that the information

provided here is sufficient for your immediate needs. Even if that is not always the

case, these chapters provide a useful foundation in these advanced issues that will allow

you to quickly gain a more comprehensive understanding of them with further study.