用一条SQL语句查询一张表得到不同条件的多个结果

一条语句，12个结果，12行，比较方便与1个dataGridView的现实。

我是用在C# Winform上的3层结构的开发上，用这个实现统计12个月每个月的销售总额。现在就差统计表了，GDI功底比较差，还在研究呵呵。

 

SELECT A1.date 日期, SUM(A1.sum) 销售额 FROM t_business A1 WHERE A1.date between '2009-1-1' and '2009-1-31'

or date between '2009-2-1' and '2009-2-27'

or date between '2009-3-1' and '2009-3-31'

or date between '2009-4-1' and '2009-4-30'

or date between '2009-5-1' and '2009-5-31'

or date between '2009-6-1' and '2009-6-30'

or date between '2009-7-1' and '2009-7-31'

or date between '2009-8-1' and '2009-8-31'

or date between '2009-9-1' and '2009-9-30'

or date between '2009-10-1' and '2009-10-31'

or date between '2009-11-1' and '2009-11-30'

or date between '2009-12-1' and '2009-12-31'

GROUP BY A1.date