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									                                                                 Database And Design
                                Database play an important role in all the areas where computers are
included such as library ,education,medicine,science etc. Before we start the concept of databases lets
first start the basics of data and information .

          Data is defined as collection of meaningful facts which can be stored and processed by the
human or computer .For example the number 260979 is nothing but only sequence of digit and those is
meaningless since it could refer to a data of birth ,phone number, sum of

rupess and etc.

                Information is defined as the processed data that will help to make the purther decisions
information will be generated after the arranging the data into a suitable and meaningful form.

            A database is a collection of information that is organized so that it can easily be accessed
,managed ,and updated .Data is very important resource for any organization for the smooth management
. So, it is important to organized the data in a form that is understandable, as unorganized data has no
meaning . A single repository of data is maintained that is defined once and then accessed by

many users .The fundamental characteristic of database approach is that the database system not only
contains data but it contains complete defination or description of the database structure and constraints
these definations are stored in a system catalog, which contain the information about the structure and
defination of the database.

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