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Written by:
Reuben C
Date added:
January 12, 2014
Level:
University
Grade:
A
No of pages / words:
3 / 766
Was viewed:
2455 times
Rating of current essay:
Essay content:
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’...
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The sharing of data is possible only if database is integrated.
V Data independence
1 Physical data independence
Physical techniques of data can be changed without changing the application programs.
2 Logical data independence
Logical structure can be changed without changing the application program...
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