xes</b> as data is added to the database
to allow the computer to jump quickly to a particular
entry.<br />
<br />
There are many different database systems which are used for a wide
variety of purposes including: Oracle, MySQL, Microsoft SQL Server, 
PostgreSQL, and SQLite. We focus on SQLite in this book because
it is a very common database and is already built into Python. 
SQLite is designed to be <em>embedded</em> into other applications
to provide database support within the application. For example,
