Database is described in following points:
1. It takes less space for storing all data. If data for each application is stored in separate files, key fields must be kept in all the files and there by additional space is consumed. If separate data files are there for promotion of employees are retirement of employees, then the key field employee-id may have to be duplicated in both files. Similarly name of employees also should be duplicated.
2. It is easy to make modification in a single file rather than multiple files. When an employees quits the job, then his details should be removed from all files where ever it occurs. If it is a centralized file then it need to be deleted only from one file.
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