There are two categories of integrity constraints: General constraints, which allow you to restrict the data values that are accepted for the variables in a single data file, such as requiring that ...

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.

Check Constraints are Supported in all Major DBMSs. 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 ...

In database management, business-critical integrity constraints enforce a company's rules. For example, a company can code a constraint that prevents a checkout counter from giving a customer a ...

Referential integrity (RI) is a method for ensuring the 'correctness' of data within a DBMS. People tend to oversimplify RI, stating that it is merely the identification of relationships between ...

Want to improve the integrity of your data? Place constraints in the database, as well as in your application. NoSQL, the catchall phrase for non-relational databases, is all the rage among Web ...

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

As with other data set characteristics, integrity constraints are inherited by a transferred data set under the conditions stated above. The only exception to this will be if the input file has an ...

Integrity Constraints (ICs) provide a valuable tool for enforcing correct application semantics. However, designing ICs requires experts and time.