JUCS - Journal of Universal Computer Science 4(5): 547-559, doi: 10.3217/jucs-004-05-0547
On the Number of Keys of a Relational Database Schema
expand article infoRalf Wastl‡
‡ University of Würzburg, Germany

Corresponding author: Ralf Wastl

© Ralf Wastl.
This article is freely available under the J.UCS Open Content License.
Citation: Wastl R (1998) On the Number of Keys of a Relational Database Schema. JUCS - Journal of Universal Computer Science 4(5): 547-559. https://doi.org/10.3217/jucs-004-05-0547
Open Access
Abstract
We introduce an inference system for deriving all keys of a relation schema. Then we show that the number of keys of a relation schema R = is bounded by .
Keywords
relation schema, keys, inference system