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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?()

发布日期:2020-04-10

View the following SQL statements:   Transaction T...
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.

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