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, ...

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 ...

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 ...

PROC UPLOAD and PROC DOWNLOAD have been modified for Version 7 or Version 8 to enable the transfer of integrity constraints that are defined on a data set. As with other data set characteristics, ...

In particular, I often look up constraints in SQL*Plus. In this post, I look at the Oracle database views and queries that I use most to get an idea what constraints I am dealing with.

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 ...

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