A database must be able to maintain and enforce the business rules and relationships in data in order to maintain the data model. It does this through referential constraints. They aren't complex, but are powerful, especially with the means to attach DRI actions to them. Joe Celko explains all, and pines for the ANSI CREATE ASSERTION statement.
2015-02-25
9,100 reads
By using cascading referential integrity constraints, you can define the actions that SQL Server 2005 takes when a user tries to delete or update a key to which existing foreign keys point.
2008-06-20
2,344 reads
By Steve Jones
While wandering around the documentation looking for some Question of the Day topics, I...
By Arun Sirpal
Third part in my Ai series with databases. When building AI solutions within the...
By Steve Jones
This month we have a very interesting invitation from Koen Verbeeck. He has hosted...
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As of June 2026, what is the best version of TLS to use with SQL Server?
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