Server-Side Programming
The task of programming for PostgreSQL falls into two broad categories: server-side programming and client-side programming.
Server-side code (as the name implies) is code that executes within a PostgreSQL server. Server-side code executes the same way regardless of which language was used to implement any given client. If the client and server are running on different physical hosts, all server-side code executes on the server machine and within the server process. If the client and server are running on the same machine, server-side code still runs within the server process. In most cases, server-side code is written in one of the procedural languages distributed with PostgreSQL.
PostgreSQL version 7.1 ships with three ...
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