There are single-user systems, in which no more than one user can access the database at any given time, and there are multi-user systems, in which several users can access the database at once. In any case, information in the database is integrated and shared, which is its main advantage. Data integration refers to the ability to present the database as an amalgamation of several separate data files that don’t overlap wholly or partially. Shared data means that certain areas in the database can be used by several different users. Information management through databases also: Reduces redundancy; Eliminates inconsistency; Provides shared access to data; Maintains standards; Imposes security restrictions; Ensures data integrity; Balances conflicting demands