本文介绍了如何在 T-SQL 中获取所有月份的值的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着跟版网的小编来一起学习吧！
问题描述
我有一个查询，我想显示一年中的所有月份，无论该月份是否有销售.我知道问题出在 Group By，但如何更改查询以便我不需要它?
I have a query that I would like to display all months for the year regardless if they have sales for that month or not. I know the issue is with the Group By, but how do I change the query so I don't need it?
SELECT
ISNULL(MONTH(sd.SBINDT),0) AS MonthSold,
SUM(sd.SBQSHP) AS QtySold
FROM
dbo.SalesData sd
WHERE
sd.SBTYPE = 'O'
AND sd.SBITEM = @Part
AND YEAR(sd.SBINDT) = @Year
AND sd.DefaultLocation = @Location
GROUP BY MONTH(sd.SBINDT)
推荐答案
试试这个:-
SELECT M.Months AS MonthSold,D.QtySold as QtySold
FROM ( SELECT distinct(MONTH(sd.SBINDT))as Months from dbo.SalesData sd)M
left join
(
SELECT MONTH(sd.SBINDT) AS MonthSold,SUM(sd.SBQSHP) AS QtySold
FROM dbo.SalesData sd
WHERE sd.SBTYPE = 'O'
AND sd.SBITEM = @Part
AND YEAR(sd.SBINDT) = @Year
AND sd.DefaultLocation = @Location
GROUP BY MONTH(sd.SBINDT)
)D
ON M.Months = D.MonthSold
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