DBMS and RDBMS

Relational Database Management System (RDBMS):

RDBMS data is structured in database tables, fields and records.

Each RDBMS table consists of database table rows. Each database table row consists of one or more database table fields. RDBMS store the data into collection of tables, which might be related by common fields. Fields are nothing but the columns in the table. RDBMS also provide relational operators to manipulate the data stored into the database tables. Most RDBMS use SQL as database query language. The most popular RDBMS are MS SQL Server, DB2, Oracle and MySQL.

 Database Management System (DBMS):

DBMS is a database program. It is a software system that uses a standard method of cataloging, retrieving, and running queries on data. The DBMS manages incoming data, organizes it, and provides ways for the data to be modified or extracted by users or other programs.

Some DBMS examples include MySQL, PostgreSQL, Microsoft Access, SQL Server etc. Since there are so many database management systems available, it is important for there to be a way for them to communicate with each other. For this reason, most database software comes with an Open Database Connectivity (ODBC) driver that allows the database to integrate with other databases.

Differences between RDBMS and DBMS:

1. A DBMS has to be persistent, that is it should be accessible when the program created the data ceases to exist or even the application that created the data restarted. A DBMS also has to provide some uniform methods independent of a specific application for accessing the information that is stored.

RDBMS is a Relational Database Management System. This adds the additional condition that the system supports a tabular structure for the data, with enforced relationships between the tables. This excludes the databases that don’t support a tabular structure or don’t enforce relationships between tables.

2. DBMS does not impose any constraints or security with regard to data manipulation it is user or the programmer responsibility to ensure the ACID PROPERTY of the database

 Whereas the RDBMS is more with this regard because RDBMS define the integrity constraint for the   purpose of holding ACID PROPERTY.

3. DBMS are for smaller organizations with small amount of data, where security of the data is not of   major concern

RDBMS are designed to take care of large amounts of data and also the security of this data.

4. In DBMS Normalization process will not be present.

In RDBMS normalization process will be present to check the database table consistency.

5. DBMS is a ordinary system to maintain the data,

RDBMS is the specific type, which follows the concepts of set theory i.e entity etc.

6. In DBMS there is no concept of Primary Key and Foreign Key

In RDBMS, we use Primary Key and Foreign Key as per requirement.

7. DBMS contains only flat data

In RDBMS there will be some relation between the entities.

8. DBMS is a collection of programs which allows a user to create and maintain a database

 RDBMS is the reserve for DBMS. RDBMS helps in recovery of the database in case of loss of database due to system failure or any other reason

9. 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.

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