Before choosing a database, you'll need a general idea of what you want it to do.
Databases come with a variety of functionality.
Let's start with a few of the important features that databases can support. Automatic Queries Stored procedures are precompiled SQL statements that run against the database. Because stored procedures are precompiled and because they reside on the database server itself, they execute much more quickly than standard SQL queries from a Web server. If you are planning to execute a query a great number of times, this speed difference becomes very important. Triggers are stored procedures that run automatically and are initiated by other database queries or stored procedures.