List three types of cardinalities for relationships within a relational database.

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Marely Evans

Computers & Technology

11 December, 15:10

List three types of cardinalities for relationships within a relational database.

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Jase Gutierrez · Answer 1

This is about identifiers in a record referring to other records.

You can have many to one, one to one, many to many.

E. g., if you have two tables, Authors and Books, then a book record could have a reference to an author record. Since an author can write many books, this would be a many-to-one relationship.