A.Insert into student(sid,sname)values(1,’Jack’)
B.Insert into student(sid,sname)values(1,"jack")
C.Insert into student values(1,"jack")
D.Insert into student values(’jack’)
A.declare
B.open
C.close
D.deallocate
A.原則性
B.一致性
C.持久性
D.對(duì)稱性