Question

此查询

SELECT P2.ID, P2.Storenum, [Periods_2013-2014].[PeriodDate] AS [OpenFromDate],
  P2.[Open From Day], P2.[Open From Time], P2.[Open To Day], 
  P2.[Open To Time]
FROM [Periods_2013-2014] 
INNER JOIN [tblOpenCloseTimes] AS P2 ON [Periods_2013-2014].[Day]=P2.[Open From Day]
WHERE ((([Periods_2013-2014].Day)=P2.[Open From Day] 
  AND P2.Storenum ="43010605" 
  AND [Periods_2013-2014].Period = "4"))

导致“输入参数值”，Query1.PeriodDate作为请求的参数，而如果我只是从第一行删除“AS [OpenFromDate]”，则查询运行完美。如果我将[Periods_2013-2014]表别名为P1，它也会这样做。这不会是一个问题，除了我需要堆叠查询以获取PeriodDate字段两次。我究竟做错了什么？

更新：此查询

SELECT T2.Storenum, T2.[PeriodDate] AS [Open From Date], T2.[Open From Day], 
T2.[Open From Time], T1.[PeriodDate] AS [Open To Date], T2.[Open To Day], 
T2.[Open To Time]
FROM [Periods_2013-2014] AS T1, 
(SELECT P2.Storenum, P1.[PeriodDate],  P2.[Open From Day], P2.[Open From Time], 
P2.[Open To Day], P2.[Open To Time]
FROM [Periods_2013-2014] AS P1 INNER JOIN tblOpenCloseTimes AS P2 
ON P1.[Day]=P2.[Open From Day]
WHERE (((P1.Day)=P2.[Open From Day] 
   AND P2.Storenum ="43010605" 
   AND P1.Period = "4"))
ORDER BY P1.[PeriodDate]) AS T2
WHERE T1.[Day]=T2.[Open To Day]
AND T1.[PeriodDate]>=T2.[PeriodDate] 
AND T1.[PeriodDate] - T2.[PeriodDate] <7
ORDER BY P1.[PeriodDate];

现在我已经从Property表中删除了Order By子句。

Answer 1

Access不允许您在查询中使用字段别名。所以，我想问题出在你的Where条款中。

尝试删除名称：P2并使用完整的表名，以便您的语句如下所示：

SELECT [tblOpenCloseTimes].ID, [tblOpenCloseTimes].Storenum, [Periods_2013-2014].[PeriodDate] AS [OpenFromDate],
  [tblOpenCloseTimes].[Open From Day], [tblOpenCloseTimes].[Open From Time], [tblOpenCloseTimes].[Open To Day], 
  [tblOpenCloseTimes].[Open To Time]
FROM [Periods_2013-2014] 
INNER JOIN [tblOpenCloseTimes] ON [Periods_2013-2014].[Day]=[tblOpenCloseTimes].[Open From Day]
WHERE ((([Periods_2013-2014].Day)=[tblOpenCloseTimes].[Open From Day] 
  AND [tblOpenCloseTimes].Storenum ="43010605" 
  AND [Periods_2013-2014].Period = "4"))

我想知道为什么你为其中一个表使用别名而不是其他表。为列名使用别名很好。但是，这些别名不应该在Where子句中使用。

此外，您可以参考以下链接了解更多详情：

为什么只有在使用SELECT AS时才能获得“输入参数值”

1 个答案: