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(a) Explain the three types of potential mistake which could occur if concurrency control is not properly enforced in the database system. Support your answer with appropriate example for each.
(b) Explain the data access protocol based on the compatibility matrix.
(c) Describe "deadlock" and give an example.
(d) Describe how a deadlock state can be detected and how the system can break such a state.
Read the description below and draw an Entity-Relationship diagram for it. You must use the symbols described in the course materials. This database will help the Parents Assocc
Do the 11.1 11.1 Credit Card Use. Consider the following hypothetical bank data on consumers’ use of credit card credit facilities in Table 11.3. Create a small worksheet in Exce
Explanation on Data Sharing?
Explain the disadvantages of file oriented approach? In the oriented approach Applications are designed in isolation. Design of application is optimized for one application. In
how to solve the C type problems?
what benefit can a company gain by managing its own infrasture and services
Can we delete data element, which is being used by table fields. No we cant delete data element.
Can a domain, assigned to a data element be changed? Yes. We can do so by just overwriting the entry in the field domain.
Write a query that display ename annual salary and comm from emp table
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