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What is Primary key? Primary Key - Primary key is one of the candidate keys which uniquely identifies each row in the relation.
What is an entity relationship model? The entity relationship model is a set of basic objects known as entities and relationship between those objects. An entity is a thing or
Homework chapter 10 no 3
How can we Classify the operations on classes This step fundamentally means all three models functional, object and dynamic (studied in last section) must be combined so that
The natural join is equal to which product? The natural join is equal to Combination of projection and Cartesian product
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What are the uses of ODBC? Under what circumstances we use this technology? ODBC expose database capabilities within a standardized way to the application programmer by an ap
What is System R? What are its two major subsystems? System R was intended and developed over a period of 1974-79 at IBM San Jose Research Center. It is a prototype and its pur
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what are the reasons having variable length records
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