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 look at the Oracle database views and queries ...

Data type and data length are the most fundamental integrity constraints applied to data in the database. Simply by specifying the data type for each column when a table is created, the DBMS will ...

By defining referential constraints, you can set up the database to control the semantic accuracy of the data it contains. To define a referential constraint, you must create a primary key in the ...

The SAS/ACCESS interface view engine generally supports all actions and constraints specified by triggers. For more information, refer to your DBMS documentation.

Real-Time Constraints for a Database A better approach is to build awareness of real-time constraints in a database system. Some of the considerations are: Database transactions must have a priority.

Cascading referential integrity constraints are foreign key constraints that tell SQL Server to perform certain actions when a primary key field in a primary key-foreign key relationship is ...