Types of database systems

 Types of database system :-

The DBMS can be classified according to the number of users and the database site locations. These are :- 

1. On the basis of the number of users :- 

• Single-user DBMS
• Multi-user DBMS

     2. On the basis of the site location :- 

• Centralized DBMS
• Parallel DBMS
• Distributed DBMS
• Client/server DBMS

In this section, we will discuss about some of the important types of DBMS system, which are presently being used.

The database system may be multi-user or single-user. The configuration of the hardware and the size of the organization will determine whether it is a multi-user system or single user system. 

In single user system the database resides on one computer and is only accessed by one user at a time. This one user may design, maintain and write database programs. 

Due to large amount of data management most systems are multi-user. In this situation the data are both integrated and shared. A database is integrated when the same information is not recorded in two places. For example, both the library department and the account department of the college database may need student addresses. Even though both department may different portions of the database, the students addresses should only reside in one place. It is the job of the DBA to make sure that the DBMS makes the correct addresses available from one central storage area.