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PostgreSQL 7.3.2 Programmer's Guide

19-2. A Simple PL/pgSQL Function to Increment an Integer 19-3. A Simple PL/pgSQL Function to Concatenate Text 19-4. A PL/pgSQL Function on Composite Type ...
Hackaday

PL/pgSQL

Usually databases are treated primarily as fairly dumb data storage systems, but they can be capable of much more. Case in point the PostgreSQL database and its – Ada-based – PL/pgSQL programming ...