Change

CONSTRAINT fk_Contact13_Sid FOREIGN KEY(ContactID) REFERENCES Contact12(ContactID)

to

CONSTRAINT fk_Contact13_Sid FOREIGN KEY(ContactID) REFERENCES Contact12(ContactID) ON UPDATE CASCADE

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Deja View - The strange feeling that somewhere, sometime you've optimised this query before

How to get the best help on a forum

http://www.sqlservercentral.com/articles/Best+Practices/61537