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Explain the Natural join Natural join is a binary operator which is written as (R* S) in which R and S are relations. The effect of the natural join is the set of all combinati
Question 1 Explain ER model Question 2 What are the characteristics of a computer provided information? Question 3 What are facts and guidelines to be considered when se
Aggregation : One limitation of the E-R diagram is that they do not permit representation of relationships between relationships. In such a case the relationship along with its ent
State the Steps of Object Design Object design is a very iterative process in which various classes, relationships among objects are added when you move from one level to
what is query processing?
Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
User error : This contains errors in the program (e.g., Logical errors) with errors made by online users of database. These types of errors can be avoided by applying some check
About Attribute inheritance
why are older data base model are being replaced by new data model
Lack of Redundancy We have talked about the problems of repetition of information in a database. Such repetition should be stay away as much as possible. Let us state once again t
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