Question

SQL新手，但我很确定我的查询是正确的。我已经尝试了一千种不同的方法但它仍然有时会将我的列/别名lead_ID_t视为参数。我把所有东西放在方括号内试图提供帮助，但无济于事......

我在notepad ++中编辑查询，当我将其粘贴到Access中时，它运行得很好。然后我保存并关闭查询。当我尝试再次运行它时，它将lead_ID_t视为参数，我的格式完全消失了......任何人都可以解释发生了什么？

SELECT [Total].[lead_ID_t] AS [Lead ID], 

IIF(isnull([Total].[lead_count_t]-[F9].[lead_count_f]),0,[Total].[lead_count_t]-[F9].[lead_count_f]) AS [V Calls]

FROM (SELECT DISTINCT [Lead_ID] AS [lead_ID_t], Count([Lead_ID]) AS [lead_count_t] 

FROM (SELECT * FROM [Logs] WHERE [log_actor] <> "Five9 Dialer") As [TData] GROUP BY [Lead_ID])  AS [Total] 

LEFT JOIN (SELECT DISTINCT [Lead_ID] AS [Lead_ID_f], count([Lead_ID]) AS [lead_count_f] 

FROM (SELECT * FROM [Logs] WHERE [log_actor] = "Five9 Dialer") As [FData] GROUP BY [Lead_ID])  AS [F9] ON [Total].[lead_ID_t]=[F9].[lead_ID_f];

PS。使用和不使用iif语句时会发生同样的错误

Answer 1

考虑调整后的紧凑查询：

删除多余的嵌套级别，因为您可以在聚合WHERE查询中使用GROUP BY。
删除DISTINCT，因为汇总查询已经返回不同的分组值。
替换IIF()的{{1}}（NULL为0的语句）。
虽然 Total 可能不是列出的MS Access或JET保留字，但它可能是GUI应用程序保留字，从而导致问题。使用以前的子查询别名 TData 和 FData 。
或者，对没有子查询或连接的一个主查询使用条件聚合，并且可以使用计算列来避免重复。

紧凑查询

NZ()

条件聚合

SELECT [TData].[lead_ID_t] AS [Lead ID],
       NZ(([TData].[lead_count_t] - [FData].[lead_count_f]),0) AS [V Calls]
FROM
  (SELECT [Lead_ID] AS [lead_ID_t],
          COUNT([Lead_ID]) AS [lead_count_t]
   FROM [Logs]
   WHERE [log_actor] <> 'Five9 Dialer'
   GROUP BY [Lead_ID]) AS [TData]

LEFT JOIN    
  (SELECT [Lead_ID] AS [Lead_ID_f],
          COUNT([Lead_ID]) AS [lead_count_f]
   FROM [Logs]
   WHERE [log_actor] = 'Five9 Dialer' 
   GROUP BY [Lead_ID]) AS [FData]

ON [TData].[lead_ID_t] = [FData].[lead_ID_f];

MS Access将我的列/别名视为参数......但有时仅将其视为参数

1 个答案: