8．使用LIKE关键字，在emp表中，要显示在1981年雇佣的所有员工的信息。

A.LIKE ’%国%’

B.LIKE ‘%国_’

C.LIKE ’_国%’

D.LIKE ‘_国_’

A.UPDATE emp SET salary+=300 where eNum='01099';

B.UPDATE emp SET salary=salary+300 where eNum='01099';

C.ALTER TABLE emp SET salary=salary+300 where eNum='01099';

D.ALTER TABLE emp SET salary+=300 where eNum='01099';

A.UPDATE emp SET salary+=300 where eNum='01099';

B.UPDATE emp SET salary=salary+300 where eNum='01099';

C.ALTER TABLE emp SET salary=salary+300 where eNum='01099';

D.ALTER TABLE emp SET salary+=300 where eNum='01099';

A.Order By

B.Group By

C.Having

D.Like

A.UNIQUE

B.DISTINCT

C.ELIMINATE

D.REMOVE