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Differentiate strict two phase locking protocol and rigorous two phase locking protocol.
In strict two phase locking protocol all exclusive mode locks taken by a transaction is held unless that transaction commits.
Rigorous two phase locking protocol needs that all locks be held until the transaction commits.
What is meant by log-based recovery? The most widely used structures for recording database changes is the log. The log is a sequence of log records, recording all the update a
In an E-R diagram how attributes are represented ? In an E-R diagram attributes are represented in a ellipse.
How many levels can be viewed in Architecture of the database ? Architecture of the database can be viewed as three levels.
Describe Interfaces for the DBA? Interfaces for the DBA - Most database systems holds privileged commands which could be used only through the DBA's staff. These involves com
How do you find the final model after iterative analysis? Why is iterative analysis of any of the problem needed? The final model serves as the base for system architectur
Develop a database broker framework to implement a persistence mechanism for the domain objects involved in the use case dealt with in Question 2. a. Specify the attribute type
Update or Modify operation alters the existing values. If these operations alter the value that is the foreign key also, the only check need is the similar as that of the Insert op
(a) Why did SAP introduce the extended star schema?
Ask questiwhat is row indicator in database on #Minimum 100 words accepted#
Define physical and logical data independence. How does this architecture help in achieving these? Data independence entails that change in one view must not need a change in t
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