Sql server 在SQLServer中添加30天、60天和90天列，用于在此期间支付的款项

我想在GridControl中添加三列，显示过去30天、60天和90天的付款情况。 下面是我的SQL语句，我使用它来获取单个客户的所有付款（金额）

SELECT p.CustomerID, c.FirstName, c.LastName, SUM(p.Amount) As 'Amount
FROM Payment p
INNER JOIN Customer c
on p.CustomerID = c.ID
Group by p.CustomerID, c.FirstName, c.LastName 

我也尝试了以下方法，但它只给我一个空值

SELECT p.CustomerID, c.FirstName, c.LastName, SUM(p.Amount) As 'Amount', a.[30Days] As '30 Days'
FROM Payment p
inner join Customer c
on p.CustomerID = c.ID
JOIN (SELECT SUM(p.Amount) AS '30Days'
      FROM Payment p 
      WHERE DATEDIFF(day, GETDATE(), PaymentDate) BETWEEN 0 AND 30) AS a ON c.ID = p.CustomerID
Group by p.CustomerID, c.FirstName, c.LastName, a.[30Days]

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您应该查看datediff-您的参数是错误的，您可以使用条件聚合，这样就不需要第三次连接

SELECT p.CustomerID,  SUM(p.Amount) As 'Amount',
         sum(case when DATEDIFF(day,  PaymentDate,GETDATE()) BETWEEN 0 AND 30 then amount else 0 end) [30days],
         sum(case when DATEDIFF(day,  PaymentDate,GETDATE()) BETWEEN 0 AND 60 then amount else 0 end) [60days],
         sum(case when DATEDIFF(day,  PaymentDate,GETDATE()) BETWEEN 0 AND 90 then amount else 0 end) [90days]
FROM Payment p
INNER JOIN Customer c
on p.CustomerID = c.customerID
Group by p.CustomerID;

---

您应该查看datediff-您的参数是错误的，您可以使用条件聚合，这样就不需要第三次连接

SELECT p.CustomerID,  SUM(p.Amount) As 'Amount',
         sum(case when DATEDIFF(day,  PaymentDate,GETDATE()) BETWEEN 0 AND 30 then amount else 0 end) [30days],
         sum(case when DATEDIFF(day,  PaymentDate,GETDATE()) BETWEEN 0 AND 60 then amount else 0 end) [60days],
         sum(case when DATEDIFF(day,  PaymentDate,GETDATE()) BETWEEN 0 AND 90 then amount else 0 end) [90days]
FROM Payment p
INNER JOIN Customer c
on p.CustomerID = c.customerID
Group by p.CustomerID;

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您是否有一列可用于计算天数？您需要添加一列以捕获付款完成的日期和时间。这样，您就可以使用日期差异获得所需的结果。您是否有一列可用于计算天数？您需要添加一列以捕获付款完成的日期和时间完成。这样您就可以使用日期差异来获得所需的结果。