怎摸查出来的项是重复的?SQL语句为:
select s.LoginName,s.LoginPass,(select c.CountName from CountInfo as c) from LoginInfo as s
谢解答~
select s.LoginName,s.LoginPass,(select c.CountName from CountInfo as c) from LoginInfo as s
谢解答~
select s.LoginName,s.LoginPass,c.CountName from LoginInfo as s,CountInfo as c
where s.某关联字段=C.某关联字段