如何只取一条负数的记录 CODE, ITEM, QNT
---------------
A, 1, -200
A, 2, -80
A, 3, -50
A, 4, 120
A, 5, 260
我想得到的结果是
A, 3, -50
A, 4, 120
A, 5, 260
就是负数的部分我只要抓一条就可以了,前面的可以不要,但正数的我都要
------解决方案-------------------- select * from table1 as a where QNT>=0 or not exists(select 1 from table1 where a.QNT<0 and QNT<0 and ITEM>a.ITEM) ------解决方案--------------------
+1 ------解决方案--------------------
改一下大版的就可以了
select Code,Item,Qnt,(case when Qnt>0 then '' else '*' end) Flag
from table1 as a where QNT>=0 or not exists(select 1 from table1 where a.QNT<0 and QNT<0 and ITEM>a.ITEM)