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我的 select 语句中有嵌套IIF()函数，每个函数内部都有一个嵌套的MAX(). 似乎希望我将这个 select 语句包含在 GROUP BY 中。这是我的查询：

SELECT 
d2s_loader_performance_tbl.employee_id, 
IIF(d2s_loader_performance_tbl.wk_ending_dt=max(d2s_loader_performance_tbl.wk_ending_dt),"Last Wk",
  IIF(d2s_loader_performance_tbl.wk_ending_dt=max(d2s_loader_performance_tbl.wk_ending_dt)-7,"2 Wks Ago",
    IIF(d2s_loader_performance_tbl.wk_ending_dt=max(d2s_loader_performance_tbl.wk_ending_dt)-14,"3 Wks Ago",
      IIF(d2s_loader_performance_tbl.wk_ending_dt=max(d2s_loader_performance_tbl.wk_ending_dt)-21,"4 Wks Ago")))),
d2s_loader_performance_tbl.hrs_worked, 
d2s_loader_performance_tbl.move_count, 
d2s_loader_performance_tbl.moves_per_hour

FROM d2s_loader_performance_tbl
WHERE d2s_loader_performance_tbl.wk_ending_dt In (
SELECT DISTINCT TOP 4 wk_ending_dt 
FROM d2s_loader_performance_tbl
ORDER BY wk_ending_dt DESC)

GROUP BY 
d2s_loader_performance_tbl.employee_id,
d2s_loader_performance_tbl.move_count, 
d2s_loader_performance_tbl.moves_per_hour

当我运行时，我收到此错误：“您尝试执行一个不包含指定表达式的查询 [列出作为嵌套 IIF 的块] 作为聚合函数的一部分。当我将它放在 GROUP BY 中时（没有意义），我收到此错误：“不能在 GROUP BY 子句中具有聚合函数”

那么，访问希望我在 HE-double 曲棍球棒中做什么？这样做的目的是将周末日期变成一个相对术语。该报告每周更新一次，我厌倦了手动浏览所有查询和报告并将引用更改为新日期。

谢谢！

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1 回答 1

4

如何将部分查询放入子选择（甚至可能是单独的查询）。像这样：

SELECT 
  orig.employee_id, 
  IIF(orig.wk_ending_dt=PreAgg.max_wk_ending_dt),"Last Wk",
    IIF(orig.wk_ending_dt=PreAgg.max_wk_ending_dt)-7,"2 Wks Ago",
      IIF(orig.wk_ending_dt=PreAgg.max_wk_ending_dt)-14,"3 Wks Ago",
        IIF(orig.wk_ending_dt=PreAgg.max_wk_ending_dt)-21,"4 Wks Ago")))),
  orig.hrs_worked, 
  orig.move_count, 
  orig.moves_per_hour
FROM (
  SELECT 
  d2s_loader_performance_tbl.employee_id, 
  max(d2s_loader_performance_tbl.wk_ending_dt) AS Max_wk_ending_dt

  FROM d2s_loader_performance_tbl

  GROUP BY 
  d2s_loader_performance_tbl.employee_id
) PreAgg JOIN d2s_loader_performance_tbl AS orig ON
PreAgg.employee_id=orig.employee_id

WHERE orig.wk_ending_dt In (
  SELECT DISTINCT TOP 4 wk_ending_dt 
  FROM d2s_loader_performance_tbl
  ORDER BY wk_ending_dt DESC)
于 2013-12-31T18:23:41.030 回答