Referential constraints, which allow you to link the data values of the variables in one data file to specific variables in another data file. An example of a referential constraint would be linking ...

Data types and check constraints function by restricting values for a column, just like referential integrity, as in Foreign Keys, operates similarly. Some level of design confusion does exist because ...

The following list shows the specific types of integrity restraints that you can apply through SCL. The first four items are general constraints, which control values in a single SAS table. The last ...

Another useful query using these two constraints-related views is one that provides information on referential integrity constraints (CONSTRAINT_TYPE of R).

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, ...