A.Select Count（1）From Student
B.Select Sum（*）From Student
C.Selec tAvg（*）From Student
D.Select Count（*）From Student

A.左外连接
B.右外连接
C.内连接
D.自身连接

A.Select *From Emp Where Job>="办事员"
B.Select* From Emp Where Job==’办事员’
C.Select* From Emp Where Job<>’办事员’
D.Select* From Emp Where Job!=’办事员’

A.elect * From Emp Where HirDate>='1981-1-1' And HirDate <='1981-12-31'  
B.Select * From Emp Where Between In '1981-1-1' And <'1981-12-31'
C.Select * From Emp Where Between In '1981-12-31' And <'1981-1-1'  
D.Select * From Emp Where HirDate>='1981-1-1' NOT HirDate <='1981-12-31'

A.Select * From Emp Where EmpNO  In('791','792','793') 
B.Select * From Emp Where EmpNO ='791' Or EmpNO='792' OR EmpNO='793' 
C.Select * From Emp Where EmpNO >='791' And EmpNO<='793' 
D.Select * From Emp Where EmpNO >'791' And EmpNO<'793'

A.Select * From Emp Where EmpNO Not In('791','792','793') 
B.Select * From Emp Where EmpNO !='791' AND EmpNO!='792' And EmpNO='793' 
C.Select * From Emp Where EmpNO <>'791' AND EmpNO<>792' And EmpNO=<>793' 
D.Select * From Emp Where EmpNO =!'791' AND EmpNO =!'792' And EmpNO =!'793'

A.Select * From Emp 
B.Select * From Emp Where EmpNO Like '%%' 
C.Select * From Emp Where Name = '%%' 
D.Select * From Emp Where Name Like '%%'

A.truncate table book 
B.delete * from book
C.drop table book 
D.delete from book

A.Update grade set score=score+5
B.Update grade set score=score+5 where score>=55 or score <=60
C.Update grade set score=score+5 where score between 55 and 60
D.Update grade set score=score+5 where score >=55 and score <=60

A.select top 1 * from book order by price asc
B.select top 1 * from book order by price desc
C.select top 1 * from book where price= (select max (price)from book)
D.select top 1 * from book where price= max(price)

A.select max(score) from grade 
B.select top 1 score from grade order by score asc 
C.Select min(score) from grade 
D.select top 1 score from grade order by score desc