Database - Data Modeling with ER Model - Discussion
Discussion Forum : Data Modeling with ER Model - True or False (Q.No. 4)
4.
A minimum cardinality is the minimum number of entity instances that may participate in a relationship instance.
Discussion:
5 comments Page 1 of 1.
Kaveri said:
1 decade ago
The answer is "false" because minimum Cardinality is the minimum number of relationship instances each entity can participate in.
For eg: For a company database an employee instance can participate in minimum of 1 "WORKS FOR" relationship instance.
For eg: For a company database an employee instance can participate in minimum of 1 "WORKS FOR" relationship instance.
Amr said:
10 years ago
True.
Maximum cardinality is the maximum number of instances of an entity that can participate in an instance of a relationship. Minimum is the least number of instances of an entity that can participate in an instance of a relationship.
Maximum cardinality is the maximum number of instances of an entity that can participate in an instance of a relationship. Minimum is the least number of instances of an entity that can participate in an instance of a relationship.
Nainy said:
1 decade ago
A minimum cardinality indicates the minimum number of entities that can be "involved in a relationship".
Govind said:
1 decade ago
Cardinality means occurance of a data on aether side of a relationship.
Jyoti said:
1 decade ago
How can anyone explain?
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