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 ...
Ensuring the integrity of the organization’s databases is a key component of the DBA’s job. A database is of little use if the data it contains is inaccurate or if it cannot be accessed due to ...
A relational DBMS organizes and accesses data according to relationships among data items. The relationships among data items are expressed by tables consisting of columns and rows. The order of the ...