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.

Examples include triggers and referential integrity, as well as the primary topic of this month’s column, check constraints. Check Constraints are Supported in all Major DBMSs Check constraints are ...

It is actually much more than this. RI embodies the integrity and usability of a relationship by establishing rules that govern that relationship. By defining referential constraints, you can set up ...

Databases contain integrity constraints to prevent chaotic events from happening, such as shipping a product to a customer with no address. Each company has integrity constraints unique to its ...

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 ...

A new potential characteristic of a SAS data set known as integrity constraints has been added for SAS Version 7 or Version 8. Integrity constraints are a set of data validation rules that preserve ...

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 ...

Integrity Constraints (ICs) provide a valuable tool for enforcing correct application semantics. However, designing ICs requires experts and time. Proposals for automatic discovery have been made ...