Question

关于SQL Server“group by”子句，以下SQL语句有效：

select
  convert(datetime,ROUND(convert(float,InHistoryDate),0)) as date,
  Payername as clientname,
  SUM(COALESCE(CAST(NULLIF(ISNUMERIC(TotalCharge), 1) AS MONEY), TotalCharge)) as total_char,
  SUM(COALESCE(CAST(NULLIF(ISNUMERIC(HCPSaving), 1) AS MONEY), HCPSaving)) as savings,
  SUM(1) as claims
from EquianClaimSystem.dbo.LongHCFA1500BMHistory
group by InHistoryDate, Payername
order by 1

以下SQL语句不起作用：

select
  convert(datetime,ROUND(convert(float,InHistoryDate),0)) as date,
  Payername as clientname,
  SUM(COALESCE(CAST(NULLIF(ISNUMERIC(TotalCharge), 1) AS MONEY), TotalCharge)) as total_char,
  SUM(COALESCE(CAST(NULLIF(ISNUMERIC(HCPSaving), 1) AS MONEY), HCPSaving)) as savings,
  SUM(1) as claims
from EquianClaimSystem.dbo.LongHCFA1500BMHistory
group by 1, 2
order by 1

为什么我不能在group by子句中使用数字来引用字段的评估结果而不是SQL Server中的直接字段名称？

有解决方法吗？

按评估字段分组（sql server）

0 个答案: