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. Skip ...

In particular, this simple query shows the constraints for a given table that are foreign key constraints and which primary key constraints they depend on. displayForeignKeyConstraints.sql ...

The modification of the primary key column(s) is not allowed if foreign key values exist; (2) Neutralizing UPDATE. All foreign key values equal to the primary key value(s) being modified are set to ...

When a user-defined index exists, the index's attributes must be compatible with the integrity constraint in order for the integrity constraint to be created. For example, when adding a primary key ...