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Failure Controlling Methods:Failures can be handled using different recovery methods that are talk about later in the unit. But the first question is doing we really require recovery techniques as a failure control mechanism? The recovery methods are somewhat expensive both in terms of memory space and in time for small systems. In such a case it is more useful to better avoid the failure by some checks instead of deploying recovery method to make database consistent. Also, recovery from failure includes manpower that can be used in some other productive work if failure can be avoided. It is, thus, main to find out some general precautions that help in controlling failure. Some of these precautions might be:
Though, it may be noted that if the database system is significant it must use a DBMS that is suitably equipped with recovery measures.
Create a Student database and Retrieve the names of all students majoring in ‘CS' Consider the following relational database: STUDENT (name, student#, class, major) COURSE (co
i want to database for online assignment submission system
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Use Access 2007 to create a database called UniLib.mdb. - this file should be created on your personal drive at the university (or C: if you're using Access 2007 at home) and t
Define NULL value NULL value NULL means something is unknown. It does NOT mean null (the digit 0). Null is as well employed as attribute value for a particular entity in which
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Explain Composite attribute in SQL ? Composite attribute: A composite attribute has many components, each of that is atomic or composite.
Write an sql statement to find what is the percentage of home policies which are from the state of Arizona out of all Home policies by Policy Value.
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
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
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