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how to write tables and drow E-R diagrams for hosiptal management system and how to normalize and cardinalities?
Deadlock And Its Prevention: As seen earlier, though two phase locking protocol handles the trouble of serialisability, but it causes some troubles also. For instance, consider th
It is mandatory that for every table in the LDB hierarchy there should exist one GET statement in the report. False. It is not essential.
Draw an ER diagram that shows the organization of a simple student database. The database captures the information about letter grades obtained by university students who enrolled
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
Attributes and its types explain?
Although how will the system recover The selection of REDO or UNDO for a transaction for the recovery is completed on the basis of the state of the transactions. This state is
why shadow copy technique is used?
For the relations R and S given below: R S A B C 1 4 7 2 5 8 3 6 9
Association as a cache This association must be updated when any new element is added to it, but testing for overlap using association is more efficient. Figure:
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