43.View the following SQL statements: Transaction T1 INSERT INTO
2023-12-01英语题型
43.View the following SQL statements: Transaction T1 INSERT INTO hr.regions VALUES (5,'Pole');COMMIT; Transaction T2 UPDATE hr.regions SET region_name='Poles' WHERE region_id = 5; COMMIT; Transaction T3 UPDATE hr.regions SET region_name='North and South Poles' WHERE region_id = 5; You want to back out transaction T2. Which option would you use?
A.It is possible, but transaction T3 also backs out.
B.It is possible with the NOCASCADE_FORCE option.
C.It is possible with the NONCONFLICT_ONLY option.
D.It is not possible because it has conflicts with transaction T3.
正确答案是B
