Data Consistency

Data Consistency: By controlling the data redundancy the data consistency is obtained in the system. If a data item that appears only once, any update to its value has must to be performed only once and the updated value is immediately available to all users.It is one of the most important advantages of database management system.

If the DBMS has reduced redundancy to its minimum level, the database system enforces consistency. It means that when a data item appears more than once in the database and that is updated, the DBMS automatically updates each occurrence of the data item in the database of the same file.