In file system approach many programmers will be creating files over a long Fax Number List period and various files have different format, in various application languages. Therefore there is possibility of information getting duplicated, this redundancy is storing same data multiple Fax Number List times leads to higher costs and wastage of space. This may result in data inconsistency in the application, this is because update is done to some of the files only and not all the files.
Moreover in database approach multiple views can be created. Fax Number List View is a tailored representation of information contained in one or more tables. View is also called as "Virtual Fax Number List table" because view does not contain physically stored records and will not occupy any space. A multi-user database whose users have variety of Fax Number List applications must provide facilities for defining multiple views.
In traditional file system, if any changes are made to the structure Fax Number List of the files if will affect all the programs, so changes to the structure of a file may require changing of all programs that access the file. But in case of database approach the structure of the Fax Number List database is stored separately in the system catalog from the access of the application programs.