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Assignment 4: Question#1: Give any three examples of transaction where next operations are dependent upon previous and focus on importance of transaction.   Question#2: Execute the given transaction left to right and fill “local variable” and “Database variable” columns. Initial Database Values:  x=30, y=50,z=80

Assignment 4: Question#1: Give any three examples of transaction where next operations are dependent upon previous and focus on importance of transaction.   Question#2: Execute the given transaction left to right and fill “local variable” and “Database variable” columns. Initial Database Values:  x=30, y=50,z=80

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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Assignment 4:

Question#1:

Give any three examples of transaction where next operations are dependent upon previous and focus on importance of transaction.

 

Question#2:

Execute the given transaction left to right and fill “local variable” and “Database variable” columns.

Initial Database Values: 

x=30, y=50,z=80

Assignment 4: Question#1: Give any three examples of transaction where next operations are dependent upon previous and focus on importance of transaction. Question#2: Execute the given transaction left to right and fill "local variable" and "Database variable" columns. Initial Database Values: x=30, y=50,z=80 Time T1 T1- Local Database T2 T2- Local Variable Variable Values Values (x, y) Values (x, y) (x, y) t0 Read (x) t1 x =x *2 Read(y) t2 Read (z) у 3у+50 t3 x =x +z Write(y) t4 Write(x) Read(x) t5 Read (y) X=x + 50 t6 z =z+y Read(z) t7 Write (z) x =x+z t8 Commit Write(x) t9 Commit Page Break
Transcribed Image Text:Assignment 4: Question#1: Give any three examples of transaction where next operations are dependent upon previous and focus on importance of transaction. Question#2: Execute the given transaction left to right and fill "local variable" and "Database variable" columns. Initial Database Values: x=30, y=50,z=80 Time T1 T1- Local Database T2 T2- Local Variable Variable Values Values (x, y) Values (x, y) (x, y) t0 Read (x) t1 x =x *2 Read(y) t2 Read (z) у 3у+50 t3 x =x +z Write(y) t4 Write(x) Read(x) t5 Read (y) X=x + 50 t6 z =z+y Read(z) t7 Write (z) x =x+z t8 Commit Write(x) t9 Commit Page Break
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