Table of contents

Title

Features

Overview of SQL

Overview of SQL2

Inserting Data

Retrieving Data

Transactions

Types

Operators

Functions in SQL - Ugly

Functions in SQL

Functions in plPgSQL

Calling functions

Functions in Perl

Functions in Python

Why Functions?

Triggers

Trigger Example

Trigger Defn

Trigger Create

Writing Modules

Conclusion

Author: Bernard Blackham

E-mail: bernard@blackham.com.au