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how to prepare a data dictionary for online examination system for certified courses?
Differentiate sub-class and super-class? The specialization of a class is known as subclasses.eg: employee is a subclass of person and teller is a subclass of employee. Convers
what is view?explain
The natural join is equal to which product? The natural join is equal to Combination of projection and Cartesian product
File Organisation In Dbms Introduction Databases are used to store information. Usually, the principal operations we have to perform on database are those relating to:
Question: This form represents one of a number used for each sailing of a range of boats. A passenger may go on many sailings and will have the same passenger number for each.
State the definition of association An association is a structural relationship which specifies that objects of one thing are connected with objects of another. In UML, asso
What are the two types of serializability? The two types of serializability is a) Conflict serializability b) View serializability
What is Foreign Key Foreign Key: Sometimes we may have to work with an attribute that does not have a primary key of its own. To recognize its rows, we have to use the primar
What are axioms? Axioms or rules of inference give a simpler technique for reasoning about
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