有关多个月日期的快速SQL问题

Question

SELECT DISTINCT MonthName(Month([Date])) AS [Month], tblSupportCalls.System, Count(tblSupportCalls.System) AS [Total for System], Year([Date]) AS [Year]
FROM tblSupportCalls
WHERE (((tblSupportCalls.Date) Between Now() And Now()-7) AND ((tblSupportCalls.System) In ('Career Campus','E-PEEP')) AND ((tblSupportCalls.StartTime) Is Not Null) AND ((Hour([StartTime]))>=7))
GROUP BY tblSupportCalls.System, tblSupportCalls.Date;

每当我输入它给我多个月时间：

July
July
July

我只想说7月只有一次，我无法弄清楚为什么田野在不同的日子里重复着。我只是想说：

MONTH |系统|总系统|年

我正在看的是

> MONTH | System | Total Systems | Year
> July      CC           2         2010
> July      CC           7         2010
> July      CC           9         2010
> July      EE           1         2010
> July      EE           2         2010

需要：

MONTH | System | Total Systems | Year
July      CC          18         2010
July      EE          03         2010

Answer 1

您希望按年份和月份进行分组，而不是tblSupportCalls.Date。

...
GROUP BY tblSupportCalls.System, Year([Date]), Month([Date]);

Answer 2

您仍然按日期对结果进行分组（不是按月）。我想你想要的是这样的：

GROUP BY tblSupportCalls.System, Year ([tblSupportCalls.Date]), [Month([tblSupportCalls.Date]);

我认为您仍然希望按年份分组，因此2010年7月显示与2011年7月不同。