Flashcards
ER notation
Cards in this deck (12)
- 1—Cardinality ratio: 1:N for E1:E2 in R
- 2—Total participation of E2 in R
- 3—Derived Attribute
- 4—Composite Attribute
- 5—Multivalued Attribute
- 6—Key attribute
- 7—Attribute
- 8—Identifying relationship
- 9—Relationship
- 10—Weak entity
- 11—Entity
- 12What is the meaning of total participation?Every entity in the set is involved in some association (or tuple) of the relationship.
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- 1 Database Flashcards on ER notation, created by linneamd on 14/03/2016.
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- linneamd
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