Database client environment

To connect to a database server, the programs must be executed in the correct database client environment. The database client software is usually included in the database server software, so you do not need to install it when your programs are executed on the same machine as the database server. However, you must install the database client software in three-tier configurations, when applications and database servers run on different systems.

This section describes basic configuration elements of the database client environment for some well-known database servers.