| □这几天被一个支持问题烦死了,虽说结果正确...... 这几天被一个支持问题烦死了,虽说结果正确,但用户需要顺序与原表也一样 问题大概是这样的: table1 Auto F_1 F_2 F_3 1 "1" "1" 1 2 "3" "3" 2 3 "2" "2" 3 4 "2" "2" 4 5 "5" "5" 5 select f_1, f_2,sum(f_3) from table1 group by f_1,f_2,f_3 输出: "1" ,"1" ,1 "2" ,"2" ,7 "3" ,"3" ,2 "5" ,"5" ,5 这样以来就改变了在表里顺序,客户在需要这样的输出: "1" ,"1" ,1 "3" ,"3" ,2 "2" ,"2" ,7 "5" ,"5" ,5 一句sql语句就可以搞定了(这可以是一上午的想到的,昨天想用Distinct 和 关联查询都没有实现): select f_1,f_2,f_3 from (select Min(Auto),f_1,f_2,f_3 from table2 group by f_1,f_2,f_3) "1" ,"1" ,1 "3" ,"3" ,2 "2" ,"2" ,7 "5" ,"5" ,5 豁然开朗! |
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