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The Advantages And Disadvantages Of Data Redundancy

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Advantages
Reduction of of data redundancy
Data redundancy could be defined as keeping the same piece of data in two separate places within a database or data storage technology. Traditional file-based systems stores the same information in more than one file through which space is wasted unnecessarily. But the DBMS ensure that multiple copies of the same data are not stored by integrating the files to eliminate the redundancy. Sometimes, it is necessary to duplicate key data items to model relationships. Moreover, it is desirable to duplicate some data items to improve performance. Due to above reasons DBMS does not eliminate redundancy entirely.
Maintaining data consistency
The risk of data inconsistency can be reduced by controlling data …show more content…

In this way, more users share more of the data.
Advanced data integrity
Database integrity means the validity and consistency of stored data. Integrity usually engages with rules of consistency that the database is not allowed to violate which is known as constraints. Those constraints are applied to data items and relationships between records as well. Integration permits the Database Administrator to define, and the DBMS to impose, integrity constraints.
Upgraded security
The protection of the database from unauthorized users is the maintenance of database security. This controls come in the form of user names and passwords to identify people who have the authority to use the database. The accessibility of an authorized person can be limited by the operation types such as retrieval, insert, update, delete. For instance, the DBA has access to all the data in the database, a branch manager may have access to all data that relates to his or her branch office and a sales assistant may have right to access with related to properties but no access to sensitive data such as staff salary details.
Execution of

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