Describe any 4 advantages of DBMS.
Answers
Reducing Data Redundancy
Sharing of Data. ...
Data Integrity. ...
Data Security. ...
Privacy. ...
Backup and Recovery. ...
Data Consistency
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( 1 ) Reducing Data Redundancy
The file based data management systems contained multiple files that were stored in many different locations in a system or even across multiple systems. Because of this, there were sometimes multiple copies of the same file which lead to data redundancy.
This is prevented in a database as there is a single database and any change in it is reflected immediately. Because of this, there is no chance of encountering duplicate data.
( 2 ) Sharing of Data
In a database, the users of the database can share the data among themselves. There are various levels of authorisation to access the data, and consequently the data can only be shared based on the correct authorisation protocols being followed.
Many remote users can also access the database simultaneously and share the data between themselves.
( 3 ) Data Integrity
Data integrity means that the data is accurate and consistent in the database. Data Integrity is very important as there are multiple databases in a DBMS. All of these databases contain data that is visible to multiple users. So it is necessary to ensure that the data is correct and consistent in all the databases and for all the users.
( 4 ) Privacy
The privacy rule in a database means only the authorized users can access a database according to its privacy constraints. There are levels of database access and a user can only view the data he is allowed to. For example - In social networking sites, access constraints are different for different accounts a user may want to access.
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