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Posted on    August-24-2014 11:56 PM

 MSSQL Server MSSQL Server 
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Sumit Kesarwani

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Posted on    August-24-2014 12:00 AM

Referential integrity constraints require that foreign key values in one table correspond to primary key values in another. If the value of the primary key is changed -- that is, updated -- the value of the foreign key must immediately be changed to match it. Cascading updates will set this change to be done automatically by the DBMS whenever necessary.

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