SQL 按列和按日期分组

Question

我正在尝试编写一个查询，以通过 payment_method（表中的列之一）和日期来提取组数据。我可以在不按日期分组的情况下提取查询，但是一旦我添加了日期，我就无法使查询工作。有谁知道如何解决我的查询？

当前查询：

SELECT payment_method,SUM(net_amount)
DATEADD(MONTH, DATEDIFF(MONTH, 0, transaction_time),0) as OrderDateByMonth
FROM Database
WHERE [criteria]
GROUP BY payment_method
AND DATEADD(MONTH, DATEDIFF(MONTH, 0, transaction_time),0)
ORDER BY payment_method
AND OrderDateByMonth

Answer 1

您只需要使用逗号而不是AND：

SELECT payment_method, 
       SUM(net_amount),
       DATEADD(MONTH, DATEDIFF(MONTH, 0, transaction_time),0) AS OrderDateByMonth
FROM [Database]
WHERE [criteria]
GROUP BY payment_method,     -- <--- comma here
         DATEADD(MONTH, DATEDIFF(MONTH, 0, transaction_time),0)
ORDER BY payment_method,     -- <--- and here
         OrderDateByMonth ;