我有这行语法，我需要替换静态日期，以便它只在事务日期计算

Question

SUM(CASE 
        WHEN DATEDIFF(d , TransactionDate , '2018/05/09') BETWEEN  100 AND  600 
            THEN (TotalValue-TotalPaidtoDate) 
    end )AS [30DaysAmount]

Answer 1

你的意思是今天的约会吗？如果是，请使用getdate()：

SUM(CASE WHEN DATEDIFF(day, TransactionDate , GETDATE()) BETWEEN 100 AND 600 
         THEN (TotalValue - TotalPaidtoDate) 
    END) AS [30DaysAmount]

我不确定列名称与期间的501天有什么关系。