dont dont post existing one sure sure dislike very strict warning Explain what the problem is in the table above! Including typeWhat is the problem? Make a solution with 2PL. How much the sum isT1T2T3Bal xBal ySumt1begin_tran15075t2 begin_tranread(Bal_x)Bal_x = Bal_x - 25Sum = 015075read(Bal_x)Sum = Sum + Bal_xbegin_tranread(Bal_y)Bal_y = Bal_y+t315075t415075150read(Bal_y)Sum = Sum + Bal_yt5write(Bal_x)commit2012575150t6write(Bal_y)12595225t7commitcommit12595225

Answered: T1 T2 T3 Bal_x Bal_y 75 75 Sum…

T1 T2 T3 Bal_x Bal_y 75 75 Sum begin_tran Sum - 0 read(Bal_x) Sum = Sum + Bal_x t1 150 t2 begin_tran read(Bal_x) Bal_x= Bal_x - 25 150 t3 begin_tran read(Bal_y) 150 75 t4 150 75 150

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

dont dont post existing one sure sure dislike very strict warning

Explain what the problem is in the table above! Including type
What is the problem? Make a solution with 2PL. How much the sum is
T1
T2
T3
Bal x
Bal y
Sum
t1
begin_tran
150
75
t2 begin_tran
read(Bal_x)
Bal_x = Bal_x - 25
Sum = 0
150
75
read(Bal_x)
Sum = Sum + Bal_x
begin_tran
read(Bal_y)
Bal_y = Bal_y+
t3
150
75
t4
150
75
150
read(Bal_y)
Sum = Sum + Bal_y
t5
write(Bal_x)
commit
20
125
75
150
t6
write(Bal_y)
125
95
225
t7
commit
commit
125
95
225

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