Choice? *? From where? Student list? Where is it? Last name =' male' 2. Delete all information of students over 20 years old.

Delete? Student list? Where is it? Datediff(yy，born，getdate())& gt； 203, showing all the information of boys in wang xing.

Choice? *? From where? Student list? Where is it? Last name =' male'? And then what? Name? Like what? Wang %'4, add a resume field.

Alter? Table? Student list? Supplement? Resume? VARCHAR(200)？ empty