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Explain the two types of participation constraint.
1. Total: The participation of an entity set E in a relationship set R is said to be total if each entity in E participates in at least single relationship in R.
2. Partial: if only few entities in E participate in relationships in R, the participation of entity set E in relationship R is said to be partial.
Q. Explain the terms key constraints participation constraints and mapping caradinalities in ER model. Participation Constraints : The participation of an entity set E i
The database depicted in the Visio diagram describes Proceeding , Article , Researcher , article PublishedIn a proceeding, article WrittenBy researchers and proceedings Edi
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