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Flash XML slideshow
Database training
4.1.24. Incorrect summary
T
1
read_item(X);
X=X-N;
write_item(X);
read_item(Y);
Y=Y-N;
write_item(Y);
T
2
sum=0;
read_item(A)
sum=sum+A;
read_item(X);
sum=sum+X;
read_item(Y);
sum=sum+Y;
T
2
sums after X-N and before Y-N
‹ 4.1.23. Dirty read (or Temporary update)
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4.1.25. Serializability ›
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