Thursday, July 17, 2014

Difference between DBMS & RDBMS


What is the difference between DBMS and RDBMS?
1) Data Base Management System is a process of managingdata for efficient retrieval & storage of data.Ex: sysbase , FoxproThe database which is used by relations(tables) toacquire information retrival are known as RDBMSEX: SQL, ORACLE,MY-SQL SERVER2) In DBMS,client server concept is not present. In RDBMS,client server architecture is present (i.e) the client sends the request to the server and the server responds to that particular request.



3) DBMS does not impose any constraints or security withregard to data manipulation. It is user or the programmerresponsibility to ensure the ACID PROPERTY of the database.RDBMS defines the integrity constraint for the purpose ofholding ACID PROPERTY.
4) In DBMS Normalization process will not be present.In RDBMS, normalization process will be present to checkthe database table cosistency.
5) In DBMS we treats Data as Files internally.In RDBMS we treats data as Tables internally.
6) DBMS supports 3 rules of E.F.CODD out off 12 rules.RDBMS supports minimum 6 rules of E.F.CODD.
7) DBMS does not support distributed databases. RDBMS support distributed databases.
8) In DBMS we see small organization with small amount of data. RDBMS designed to take care of large amount of data.
9) DBMS contains only flat data. RDBMS contains some relation between entities.
10) DBMS supports single user RDBMS supports multiple user


The key difference is that RDBMS (relational database management system) applications store data in a tabular form, while DBMS applications store data as files. Does that mean there are no tables in a DBMS? There can be, but there will be no “relation” between the tables, like in a RDBMS. In DBMS, data is generally stored in either a hierarchical form or a navigational form. This means that a single data unit will have one parent node and zero, one or more children nodes. It may even be stored in a graph form, which can be seen in the network model.
In a RDBMS, the tables will have an identifier called primary key. Data values will be stored in the form of tables. The relationships between these data values will be stored in the form of a table as well.  Every value stored in the relational database is accessible. This value can be updated by the system. The data in this system is also physically and logically independent.
You can say that a RDBMS is an in an extension of a DBMS, even if there are many differences between the two. Most software products in the market today are both DBMS and RDBMS compliant. Essentially, they can maintain databases in a (relational) tabular form as well as a file form, or both. This means that today a RDBMS application is a DBMS application, and vice versa. However, there are still major differences between a relational database system for storing data and a plain database system.
DBMS vs. RDBMS

• Relationship among tables is maintained in a RDBMS whereas this not the case DBMS as it is used to manage the database.• DBMS accepts the ‘flat file’ data that means there is no relation among different data whereas RDBMS does not accepts this type of design.• DBMS is used for simpler business applications whereas RDBMS is used for more complex applications.• Although the foreign key concept is supported by both DBMS and RDBMS but its only RDBMS that enforces the rules.• RDBMS solution is required by large sets of data whereas small sets of data can be managed by DBMS.