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DBMS Which of the following conditions must be fulfilled to ensure the entity integrity constraint? 4 . Primany keys cannot have null values in any
DBMS
Which of the following conditions must be fulfilled to ensure the entity integrity constraint?
Primany keys cannot have null values in any record.
There should be no duplicate records in the table.
Primary keys on every instance of an entity must be unique.
INSERT and UPDATE operations resulting in an invalid primary key must not be allowed.
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