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
The post The pros and cons of self-service BI: What every industry leader should...
By Steve Jones
As this publishes, I’ll get taxiing down the runway at DIA (fingers crossed) and...
By John
AI and ChatGPT are all the rage these days. Seems like around every corner...
South Kerala tour packages offer an immersive experience into the heart of Kerala's natural...
Ever seen a corgi chihuahua mix black, or "Chigi"? This rare color variation makes...
I am running SQL Server 20.2. When I copy a query into the query...
Which cloud sources can be used for the current Data Migration Assistant (Sep 2024)
See possible answers