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For example If we are concerned with personal data of students and there mark-sheet, ‘student’ and ‘mark-sheet’ are entities.
2 Attribute:- The characteristics of an entities is called an attribute.
For Ex: Student Name , Address, city and phone number are different attributes of an entity ‘student’.
OBJECTIVES OF DATABASE
I Centrally controlled
1) Data can be stored, processed, modified or accessed in an organised way.
2) Non redundancy & consistency.
3) Security & privacy from unauthorized access.
II Logically organised:
Database is organized in logical manner.
III Integrated database:
The same collection of data is available for as many application as possible...
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