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 ...

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, ...

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 ...

Zumasys is enhancing its MultiValue database, OpenQM, with a mix of updates driven by its user community. OpenQM 4.0 introduces Data Integrity Constraints, a community-driven feature and the winning ...

When I am working with an Oracle database, I still find myself using SQL*Plus for many quick and dirty database queries. In particular, I often look up constraints in SQL*Plus. In this post, I ...

Integrity constraints are a Version 7 feature of SAS software for preserving the consistency and correctness of data that is stored in SAS tables. When integrity constraints are assigned to a table, ...