Check constraints are supported in all of the major DBMS products, including DB2, Oracle, and SQL Server. But they are too-often ignored and not implemented in production databases. Properly defined, ...

Because one of the major problems plaguing production systems today is data quality, it is imperative that DBAs understand, implement, and administer DBMS features such as constraints, referential ...

The SAS/ACCESS interface view engine generally supports all actions and constraints specified by triggers. For more information, refer to your DBMS documentation.