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Define the concept of aggregation. Give two examples where this concept is useful. Ans: Aggregation transforms a relationship among the objects into a higher-level object. A
This constraint shows that the key attribute value in each tuple must be unique, i.e., no two tuples have the similar value for the key attribute. This is because the value of the
Write a short note on built in function in QBE? Built in function in QBE: QBE involves various built in functions like AVG, MAX,MIN,SUM and CNT. We must prefix these operator
Which two tools are used to administer users for Active Directory?
Many-to-many : Entities in A and B are related with any number of entities from each other. Example: Taught_by Relationship among course and faculty. One faculty member ca
Which is an advantage of view? The Advantages of view is Data security, Derived columns and Hiding of complex queries
what is multivalued dependency
A customer places orders for parts and belongs to a particular industry group. An individual order is taken by a particular sales representative on a specific date and the sales re
With the help of a suitable diagram gives module wise explanation of system architecture of DBMS.on..
as a customer service employee explain five measures you would recommend to make even a displeased students patronize the school canteen
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