正在加载图片...
Schedule 3 Let 71 and 72 be the transactions defined previously.The following schedule is not a serial schedule,but it is equivalent to Schedule 1. T T read (A) A:=A-50 write(A) read(A) temp:=A*0.1 A:=A-temp write(A) read(B) B:=B+50 write(B) commit read(B) B:=B+temp write(B) commit Note--In schedules 1,2 and 3,the sum "A+B"is preserved. Database System Concepts-6th Edition 14.14 @Silberschatz,Korth and SudarshanDatabase System Concepts - 6 14.14 ©Silberschatz, Korth and Sudarshan th Edition Schedule 3 Let T1 and T2 be the transactions defined previously. The following schedule is not a serial schedule, but it is equivalent to Schedule 1. Note -- In schedules 1, 2 and 3, the sum “A + B” is preserved
<<向上翻页向下翻页>>
©2008-现在 cucdc.com 高等教育资讯网 版权所有