A Relational View of Data

The term relation is used here in its accepted mathematical sense. Given sets S1, S1, ยทยทยท, Sn, (not necessarily distinct), R is a relation on these n sets if it is a set of n-tuples each of which has its first element from S1, its second element from S1, and so on. We shall refer … Continue reading A Relational View of Data

Databases

A database is structured collection of data. Thus, card indices, printed catalogues of archaeological artefacts and telephone directories are all examples of databases. Databases may be stored on a computer and examined using a program. These programs are often called `databases', but more strictly are database management systems (DMS). Just as a card index or … Continue reading Databases