viewquestions/12437/ Define referential integrity constraint Explain the importance of referential integrity constraint Database Management Systems 10CS54 VTU notes 8 Marks Jun July 2013 5 Marks Dec 14Jan 15

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Asked by:anonymousguy7799

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Entity integrity

To ensure entity integrity, it is required that every table have a primary key. Neither the PK nor any part of it can contain null values. This is because null values for the primary key mean we cannot identify some rows. For example, in the EMPLOYEE table, Phone cannot be a primary key since some people may not have a telephone.


Answerd By:Rohit498

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