Mind map
Enhanced ERD
Map content
Enhanced ERD
Subtype
Supertype
Disjointness constraint
- Disjoint rule
- an supertype can be only one of the subtypes
- Overlap rule
- At any given type, an suptertype can simultaneously be two or more subtypes
- Disjoint rule
Business Rules
- Derivation
- Structural assertion
- Action assertion
Information
- Description
- 7 Database Design Mind Map on Enhanced ERD, created by Lingyun song on 17/06/2016.
- Created by
- Lingyun song
- Views
- 3
- Rating