sql- 仅显示最近四个月

Question

我的好参考是 How to filter my results so it shows the last four months of data - sql

到目前为止我有

SELECT ItemCode, SUM(QuantityOrdered) AS Total_Quantity
FROM OrderDetail 
GROUP BY ItemCode
ORDER BY SUM(QuantityOrdered) DESC;

显示

ItemCode  Total_Quantity 
PL         1200    
MA          975        
153         200

PL 的订单数量为 2011 年 9 月 23 日 200 件 2014 年 2 月 3 日 200 件 2016 年 12 月 6 日 200 件 2017 年 1 月 21 日 200 件

如何将其过滤掉以仅显示今天月份的最后四个月结果？

我可以在查询设计或 SQL 代码上做些什么吗？

Any idea on Syntax error on line WHERE dbo_SO_SalesOrderHeader.OrderDate >= dateadd(month, -4, cast(getdate() AS DATE)). Thank you so much!

SELECT dbo_SO_SalesOrderDetail.ItemCode, SUM(dbo_SO_SalesOrderDetail.QuantityOrdered) AS Total_Quantity, dbo_SO_SalesOrderHeader.OrderDate
FROM dbo_SO_SalesOrderDetail INNER 
JOIN dbo_SO_SalesOrderHeader ON dbo_SO_SalesOrderDetail.SalesOrderNo = dbo_SO_SalesOrderHeader.SalesOrderNo
WHERE dbo_SO_SalesOrderHeader.OrderDate >= dateadd(month, -4, cast(getdate() AS DATE))
GROUP BY dbo_SO_SalesOrderDetail.ItemCode
ORDER BY SUM(dbo_SO_SalesOrderDetail.QuantityOrdered) DESC;

Answer 1

添加 where 子句并将 "DateField" 与当前日期进行比较。因此，如果您的 DateField 名为 OrderDate，请将 "DateField" 替换为 "OrderDate"

SELECT ItemCode, SUM(QuantityOrdered) AS Total_Quantity
FROM OrderDetail 
where DateField >= dateadd(month, -4, cast(getdate() as DATE)) 
GROUP BY ItemCode
ORDER BY SUM(QuantityOrdered) DESC;

我猜您的日期字段实际上在 OrderHeader table 中，如果是这样，您将需要加入 OrderHeader table。下面是一个例子

SELECT ItemCode, SUM(QuantityOrdered) AS Total_Quantity
    FROM OrderDetail 
    JOIN OrderHeader on OrderHeader.Orderid=OrderDetail.OrderID
    WHERE OrderHeader.OrderDate >= dateadd(month, -4, cast(getdate() as DATE)) 
    GROUP BY ItemCode
    ORDER BY SUM(QuantityOrdered) DESC;

sql- 仅显示最近四个月

sql- show only the last four month

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