我赞成的是：select * from (select top (select convert(int,count(selfid)*0.4) from s_menu) * from s_menu ) a where selfid not in(select top (select convert(int,count(selfid)*0.2) from s_menu) selfid from s_menu) 不赞成：select * from t_qkxx where lsh in (select top 40 percent lsh from t_qkxx where lsh not in (select top 20 percent ls...
