| Article ID: | iaor1992656 |
| Country: | Germany |
| Volume: | 27 |
| Start Page Number: | 217 |
| End Page Number: | 225 |
| Publication Date: | Jun 1991 |
| Journal: | Elektronische Informationsverarbeitung und Kybernetik |
| Authors: | Biskup J., Demetrovics J., Libkin L.O., Muchnik I.B. |
The relational database schemes having unique minimal key are completely characterized. The relationships between them and normal form relation schemes are studied. Particular attention is paid to lattice theoretic aspects.