1. Introduction

Being able to search a database using queries is what makes it such a powerful tool.

Imagine a database held by a bank.

The bank want to send out a letter to everyone who is overdrawn on their account. To search manually through every account would be impossible.

A query would enable them to find thousands of customers within a few seconds.

Use the menu on the left-hand side to find out about parameters, simple and complex queries, static and dynamic queries.