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The result of the UNION operation between R1 and R2 is a relation that includes?
The result of the operation between R1 and R2 includes all the tuples of R1 and R2 which have common columns.
Explain the main advantages of DBMS over File Oriented System ?
what is Lossless-join decomposition
We require an advanced system for a Sports Centre, you are concerned only with representing the data discussed below about bookings and members. (The complete system may contain ot
What is a query tree? Ans: A query tree, as well known as operator graph, is a tree data structure that corresponds to a relational algebra expression. It denotes the inpu
Should I select imaging software that allows changes? An imaging system should not give features to edit or alter images. Images generally are formed as safe and secure records
Scenario 1: Power goes out after the first instruction. What happens?
What is deadlock? How can it be avoided? How can it be resolved once it occurs? Deadlock happens when two transactions are each waiting on a resource that the other transaction
how the string works as keyword?
what is the need of a log in dbms
What functions does a data dictionary perform? In a (DBMS)data management system, the principal functions performed by the data dictionary are Management of data defini
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