Php mysql查询-一个用于创建按月显示销售额的表的查询

我有一个mysql表，其中包含销售信息：卖家、产品、销售日期

如何编写查询以生成一个表，该表显示每个卖家每月和总共显示的总产品

这是我用来创建包含SellerName和7月份总销售额的表的查询：

select SellerName, count(*) as july 
from onlineDATA
where ReportMonth = 201207
GROUP BY SellerName
ORDER BY july DESC
LIMIT 0,30

如何修改此项以获得每个月的附加销售总额

我正在寻找这样的输出：

    SellerName   | Jun  | Jul  | Aug  | YTD
    John Doe     | 30   |  25  |  30  | 85

SELECT 

SellerName,     
SUM(IF(ReportMonth = 201206, 1.0)) AS Jun,
SUM(IF(ReportMonth = 201207, 1.0)) AS Jul,
SUM(IF(ReportMonth = 201208, 1.0)) AS Aug,
COUNT(*) AS YTD

FROM onlineDATA

GROUP BY SellerName 
ORDER BY SellerName DESC LIMIT 30;

额外的问题-当月数是用户输入时，我将如何在PHP中编写此代码-从1到12

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谢谢

我认为您必须单独定义列，如下所示：

    SellerName   | Jun  | Jul  | Aug  | YTD
    John Doe     | 30   |  25  |  30  | 85

SELECT 

SellerName,     
SUM(IF(ReportMonth = 201206, 1.0)) AS Jun,
SUM(IF(ReportMonth = 201207, 1.0)) AS Jul,
SUM(IF(ReportMonth = 201208, 1.0)) AS Aug,
COUNT(*) AS YTD

FROM onlineDATA

GROUP BY SellerName 
ORDER BY SellerName DESC LIMIT 30;

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谢谢这是有效的——但我必须在SUM（IF）语句中的“、1”之后加上“、0”。