Immediate Database Modification Example Log Write Output <To start> <T0,A,1000,950> <To,B,2000,2050 A=950 B=2050 <To commit> <T1 start> <T1,C,700,600> Bc output before T1 C=600 commits Ba,Bc <T1 commit> BA BA output after To Note:By denotes block containing X. commits Database System Concepts-6th Edition 16.15 ©Silberschat乜，Korth and SudarshanDatabase System Concepts - 6 16.15 ©Silberschatz, Korth and Sudarshan th Edition Immediate Database Modification Example Log Write Output <T0 start> <T0 , A, 1000, 950> <To , B, 2000, 2050 A = 950 B = 2050 <T0 commit> <T1 start> <T1 , C, 700, 600> C = 600 BB , BC <T1 commit> BA Note: BX denotes block containing X. BC output before T1 commits BA output after T0 commits