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1. CHAPTER TRANSACTION MANAGEMENT Suppose the following two transactions in Table 1.0 are executed concurrently without any control: Table 1.0 Time Transaction A Transaction B begin 12 t1 insert into STAFF values (52633, 'Ali", 101, 4500, "Design') update STAFF set Salary = (Salary*1.15) where Name ='Ali" 13 begin update STAFF set Salary = Salary + 200 where DeptName = 14 "Design' 15 rollback; commit; i) State the name of the concurrency control problem for the transaction in Table 1.0. ii) Name one of the approach to solve the problem in i)

1. CHAPTER TRANSACTION MANAGEMENT Suppose the following two transactions in Table 1.0 are executed concurrently without any control: Table 1.0 Time Transaction A Transaction B begin 12 t1 insert into STAFF values (52633, 'Ali", 101, 4500, "Design') update STAFF set Salary = (Salary*1.15) where Name ='Ali" 13 begin update STAFF set Salary = Salary + 200 where DeptName = 14 "Design' 15 rollback; commit; i) State the name of the concurrency control problem for the transaction in Table 1.0. ii) Name one of the approach to solve the problem in i)

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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1. CHAPTER TRANSACTION MANAGEMENT Suppose the following two transactions in Table 1.0 are executed concurrently without any control: Table 1.0 Transaction B Transaction A begin insert into STAFF values (52633, 'Ali', 101, 4500, "Design') 13 Time t1 12 update STAFF set Salary = (Salary*1.15) where Name ='Ali' begin update STAFF set Salary = Salary + 200 where DeptName = 'Design' t4 %3D %3D t5 rollback; commit; i) State the name of the concurrency control problem for the transaction in Table 1.0. ii) Name one of the approach to solve the problem in i)
Transcribed Image Text:1. CHAPTER TRANSACTION MANAGEMENT Suppose the following two transactions in Table 1.0 are executed concurrently without any control: Table 1.0 Transaction B Transaction A begin insert into STAFF values (52633, 'Ali', 101, 4500, "Design') 13 Time t1 12 update STAFF set Salary = (Salary*1.15) where Name ='Ali' begin update STAFF set Salary = Salary + 200 where DeptName = 'Design' t4 %3D %3D t5 rollback; commit; i) State the name of the concurrency control problem for the transaction in Table 1.0. ii) Name one of the approach to solve the problem in i)
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