添加信号 - MySQL的结果

Question

我在做两个表的查询。 一个表是“输入”，另一个是“输出”。 OUTPUT表中的愿望清单出现时带有加号（“ - ”较少）。当列出正面和负面的值时，这会变得更容易。

见我的查询： http://sqlfiddle.com/#!2/93dbcb/1

(SELECT nome, data, valor FROM `financ_receita` WHERE data BETWEEN ('2012-12-01') AND ('2013-12-23')) 
    UNION ALL 
(SELECT nome, data, valor FROM `financ_despesa` WHERE data BETWEEN ('2012-12-01') AND ('2013-12-23')) ORDER BY data ASC 

financ_receita =输入。

financ_despesa = out。

Answer 1

是吗？

select nome,data,if(valor<0,concat(valor),concat('+',valor)) as valor from 
(
(
    SELECT nome, data, valor FROM `financ_receita` 
    WHERE data BETWEEN ('2012-12-01') AND ('2013-12-23') 
) 
UNION ALL 
(
    SELECT nome, data, valor*-1 FROM `financ_despesa` 
    WHERE data BETWEEN ('2012-12-01') AND ('2013-12-23') 
) 
ORDER BY data ASC 
) as myTable where valor != 0