Foreign Key and Check Constraints are two types of constraints that can be disabled or enabled when required. This type of operation is needed when bulk loading operations are required or when there is no need to validate the constraint. The T-SQL Script that does the same is very simple.
USE AdventureWorks
GO
– Disable the constraint
ALTER TABLE HumanResources.Employee
NOCHECK CONSTRAINT CK_Employee_BirthDate
GO
– Enable the constraint
ALTER TABLE HumanResources.Employee
WITH CHECK CHECK CONSTRAINT CK_Employee_BirthDate
GO
It [...]
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About Pinal Dave
Pinalkumar Dave is a Microsoft SQL Server MVP and a Mentor for Solid Quality India. He has written over 1100 articles on the subject on his blog at http://blog.sqlauthority.com. He is a dynamic and proficient Principal Database Architect, Corporate Trainer and Project Manager, who specializes in SQL Server Programming and has 7 years of hands-on experience. He holds a Masters of Science degree and a number of certifications, including MCDBA and MCAD (.NET). He was awarded Regional Mentor for PASS Asia.
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