Organisation of Data

This excellent PPT provides a clear and easy to teach overview of the different methods of organising data within flat file and relational dbs.

Kindly contributed by FatMax

RDBMS

This presentation starts off by explaining the reasons why a relational database is preferable over a flat-file database.

The presentation then moves on to a look at entities and relationships. It walks you through creating a basic ER diagram.

It is probably the clearest explanation about this topic that I have come across to date.

Kindly contributed by FatMax

Data organisation for effective retrieval - North Chadderton

A comprehensive set of notes written specifically for the AQA syllabus. However, they are just as relevant for the OCR spec.

Source: http://www.nchadderton.zen.co.uk