输入：
A
-----
5000
4000
-3000
-2000
输出：
A FEEDBACK
----- --------
9000 POSITIVE
-5000 NEGATIVE
他们已经输入了。我需要编写代码以带出输出。
答案 0 :(得分：1)
我认为该查询应该这样做：
select sum(a) as a, 'POSITIVE' as feedback from t where a >= 0
union
select sum(a) as a, 'NEGATIVE' as feedback from t where a < 0