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What is Referential Integrity? An ERD is correctly translated into a Relational Schema. Primary Keys must have values. A Primary Key in a Table must
What is Referential Integrity?
An ERD is correctly translated into a Relational Schema.
Primary Keys must have values.
A Primary Key in a Table must be related to a Candidate Key in an Entity.
The value of a Foreign Key FK in a Table must either match one of the values in the primary key column of the referred Table or the value must be Null.
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