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Written by:
Ilene E
Date added:
June 28, 2015
Level:
University
Grade:
A
No of pages / words:
4 / 847
Was viewed:
5720 times
Rating of current essay:
Essay content:
F. Codd in 1969, then a researcher at IBM. The model is based on branches of mathematics called set theory and predicate logic. The basic idea behind the relational model is that a database consists of a series of unordered tables (or relations) that can be manipulated using non-procedural operations that return tables...
displayed 300 characters
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This model was in vast contrast to the more traditional database theories of the time that were much more complicated, less flexible and dependent on the physical storage methods of the data.
The logical view of Data
The relational database model enables us to think about out data logically rather than physically and we design our database base on the entities and tables and their attributes and provide it as simple diagrams to the users...
displayed 300 characters
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