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Question:
a) There are three concurrency problems, i.e. three types of potential mistake which could occur if concurrency control is not properly enforced in the database system. Briefly explain each of these concurrency problems.
(b) Locking can be used to solve the three concurrency problems, but it can also produce the problem of deadlock. What is deadlock? Briefly explain how the problem of deadlock can be handled.
What is the meaning of Recovery? In deferred update methods, if a transaction fails before arriving its commit point, it will not have altered the database in any way, so UNDO
Question: In relation to distributed database answer the following questions: (i) Give a brief definition of distributed database. Support your answer with an appropriate di
For problems 1-4, give all candidate keys for the tables with FDs specified. Composite candidate keys must be put in parentheses, and candidate keys must be separated with commas
What is the used of specifying alias? Specifying alias: is used to rename column or attribute in a table.
er diagram of sport
1. Design the logic, using a looping structure, for a program that outputs every even number from 1 through 25 along with its square and cube. 2. Mr. Sanchez owns 12 apartme
The ER diagram clearly showing the additional tables you have implemented. SQL table creation scripts for the tables you have set up. SQL scripts showing the sample data you
List and also explain the dissimilar stages of DDLC ?
what are the limitations of dbms?
a publishing company produce scientific books on various subjects. the books are written by authors who specialize in one particular subject. the company employs editors who, not n
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