Databases are used to store and retrieve data, and are commonly used with mod_perl applications. In this section, we present the following chapters:
Chapter 17 gives an introduction to the types of databases that are available to mod_perl applications.
Chapter 18 covers techniques for sharing data between processes that are unique to mod_perl.
Chapter 19 introduces you to DBM files and how mod_perl interacts with them.
Chapter 20 shows you how to use Apache::DBI to connect to relational databases such as mysql.