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DataBase Management Systems Lecture Notes

Department of IT, SVECW 1 SHRI VISHNU ENGINEERING COLLEGE FOR WOMEN::BHIMAVARAM DEPARTMENT OF INFORMATION TECHNOLOGY DataBase Management Systems Lecture Notes UNIT-1 Data: It is a collection of information. The facts that can be recorded and which have implicit meaning known as 'data'. Example: Customer ----- DataBase : It is a collection of interrelated data. These can be stored in the form of tables. A DataBase can be of any size and varying complexity. A DataBase may be generated and manipulated manually or it may be computerized. Example: Customer DataBase consists the fields as cname, cno, and ccity Cname Cno Ccity DataBase System: It is computerized system, whose overall purpose is to maintain the information and to make that the information is available on demand.

Database designers are responsible for identifying the data to be stored in the database and for choosing appropriate structures to represent and store this data. 3. End Users: People who wish to store and use data in a database. End users are the people whose jobs require access to the database for querying, updating and generating reports,

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