M mjf_jigh Unregistered / Unconfirmed GUEST, unregistred user! 2002-04-26 #1 请问如何用TQUERY 查询象标题一样是怎么错了 难道不能用distinct 若是不能用 那我该怎么办呢?
C chshanghai Unregistered / Unconfirmed GUEST, unregistred user! 2002-04-26 #2 用下面这句sql 吧 select count(*) from (select distinct 学号 from ...) a
M mjf_jigh Unregistered / Unconfirmed GUEST, unregistred user! 2002-04-26 #3 那单独用select distinct 学号 from ...)这句可以吗?
Q qq Unregistered / Unconfirmed GUEST, unregistred user! 2002-04-27 #5 select count(学号 ) from group by 学号