根据SQL标准,要修改表student中所有学生的年龄age,使之在原值基础上减一,下面哪个语句适用?()A update student set age = 1B update student set age = age - 1C update age = age -1 from studentD update from student where age = age -1

根据SQL标准,要修改表student中所有学生的年龄age,使之在原值基础上减一,下面哪个语句适用?()

A update student set age = 1

B update student set age = age - 1

C update age = age -1 from student

D update from student where age = age -1


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