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What are the several forms of identity? a) Value b) Name c) Built-in
By using the delete operation some consisting records can be deleted from a relation. To delete some definite records from the database a condition is also specified based on which
How the time stamps are implemented Use the value of the system clock as the time stamp. That is a transaction's time stamp is equivalent to the value of the clock when the tra
does tables are called relations
After the completion of the logical model the physical model is to be made. The oracle 10 G will be used as a database server and all the tables with their column are created and i
Define access time. Access time is the time from when a read or write request is issued to when data transfer starts.
Discuss the types of integrity constraints in which must be checked for the update operations - Insert and Delete. Give examples. Insert operation can violet any of the subse
Sub query in the UPDATE command : Example : //Double the commission for employees, who have got at least 2 increments. UPDATE EMP SET COMM = COMM * 2 WHERE
Define the concept of Object Diagram An object diagram shows a set of the objects and their relationships with each other at a point of time. In a static view, object diagram
Explain how the associations are implemented as classes. A general approach in this case is to transform an association class into a simple class linked to two original classes
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