When I am working with an Oracle database, I still find myself using SQL ... this simple query shows the constraints for a given table that are foreign key constraints and which primary key ...

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.

Before there was SQL, databases had tight, navigational programming ... of this is fairly simple. Every table that you want to use in relations should have a primary key constraint; this can ...