What is a Database?
What is a
Database?
A database
is a collection of information that's related to a particular subject or
purpose, such as tracking customer orders or maintaining a music collection. If
your database isn't stored on a computer, or only parts of it are, you may be
tracking information from a variety of sources that you have to coordinate and
organize yourself.
For
example, suppose the phone numbers of your suppliers are stored in various
locations: in a card file containing supplier phone numbers, in product
information files in a file cabinet, and in a spreadsheet containing order
information. If a supplier's phone number changes, you might have to update
that information in all three places. In a database, however, you only have to
update that information in one place — the supplier's phone number is
automatically updated wherever you use it in the database.
Indeed a database is a
collection of logically related data files which is integrated and organized so
as to provide s single comprehensive file system. Database system design is
concerned with the problem of organizing the database, accessing data on it,
using it, updating it and providing output (reports or responses to file
interrogations) to a variety of users; e. g. a students’ file, Marks file,
Payment’s file. The Marks’ file will comprise records of marks scored by the
students.
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