Chapter 4. Using SQL

Structured Query Language, or SQL (usually pronounced “sequel”), is a very common language used in many database applications that provides a relatively simple, yet powerful, way to access a database. Because it’s an open standard, it’s used in a variety of database products, from freeware to those costing tens of thousands of dollars. Because SQL is so common and there’s a likelihood you’ll use it at some point, we’ll spend this chapter delving into the details of this language.

Using SQL, HTML, and a scripting language (such as PHP), you can create dynamic Web sites that integrate up-to-the-minute information with optimized design and content. Some of the most common ways to use SQL are tracking visitors to a Web site, providing ...

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