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Cardinality ratio

The cardinality ratio for a binary relationship specifies the number of relationship instances that an entity can participate in.

 The participation constraint specifies whether the existence of an entity depends on its being related to another entity via the relationship type. This is of two types:
1. Total participation.
2. Partial participation.

omkar nath @omkarnath
4 May 2017 03:40 am

cardinality ratio defination