Question

characteristics of database in six points

Answer 1

Characteristics of Database :-


1. Represent Some Aspects of real world applications

A database represents some features of real world applications. Any change in the real world is reflected in the database. For example, let us take railway reservation system; we have in our mind some certain applications of maintaining records of attendance, waiting list, train arrival and departure time, certain day etc. related to each train.

2. Self Describing nature

A database is of self describing nature; it always describes and narrates itself. It contains the description of the whole data structure, the constraints and the variables. It makes it different from traditional file management system in which definition was not the part of application program. These definitions are used by the users and DBMS software when needed.

3. Logical relationship between records and data

A database gives a logical relationship between its records and data. So a user can access various records depending upon the logical conditions by a single query from the database.

4. Control Data Redundancy

DBMS follows the rules of normalization, which splits a relation when any of its attributes is having redundancy in values. Normalization is a mathematically rich and scientific process that reduces data redundancy.

5. Query Language

DBMS is equipped with query language, which makes it more efficient to retrieve and manipulate data. A user can apply as many and as different filtering options as required to retrieve a set of data. Traditionally it was not possible where file-processing system was used.

6. Multiuser and Concurrent Access

DBMS supports multi-user environment and allows them to access and manipulate data in parallel. Though there are restrictions on transactions when users attempt to handle the same data item, but users are always unaware of them.

Answer 2

.Manages Information 
Eg: A system may have to maintain information of various employees working in its organization, their names,addresses, and other details which may in later instance be modified or deleted. 

2.Easy to operate on data 
Inserting more data, deleting unuseful data, updating, searching etc is easy.