Abstract
Every organization that uses a computer system to maintain its operational and management information does so using a collection of interrelated files called a database. Every file in a database consists of a template called a record template, which is used to create individual records of information. Each record contains a collection of predetermined fields into which the record’s information is entered. A simple equivalent to a computer file is a physical address book which contains the names, addresses and telephone numbers of your friends and acquaintances. Just as in a computer file, each record in the address book has the same format — one line for name, three lines for address, one line for post code and one line for telephone number.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Author information
Authors and Affiliations
Rights and permissions
Copyright information
© 1995 Dexter J. Booth
About this chapter
Cite this chapter
Booth, D.J. (1995). Relations. In: Foundation Discrete Mathematics for Computing. Tutorial Guides in Computing and Information Systems. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-7114-2_7
Download citation
DOI: https://doi.org/10.1007/978-1-4899-7114-2_7
Publisher Name: Springer, Boston, MA
Print ISBN: 978-0-412-56280-8
Online ISBN: 978-1-4899-7114-2
eBook Packages: Springer Book Archive