# Derby server-side programming

This section discusses special programming for Derby.

In particular, this section discusses how to program database-side JDBC procedures, triggers, and table functions.

- Programming database-side JDBC procedures
  Methods invoked within an application are called application-side methods. Methods invoked within Derby are called database-side procedures.
- Programming trigger actions
  Derby allows you to create triggers. When you create a trigger, you define an action or set of actions that are executed when a database event occurs on a specified table. A database event is a delete, insert, or update operation.
- Programming Derby-style table functions
  Derby lets you create table functions. Table functions are functions which package up external data to look like Derby tables. The external data can be an XML file, a table in a foreign database, a live data feed--in short, any information source that can be presented as a JDBC ResultSet.