Sorting 按匹配日期访问总和。排序不'；行不通

好的，我有一个老师的时间表，标题如下

它考虑了与学生相处的时间 月底的报告

关键是要把所有的数学运算相加

    Date=>         =>         =>Type=>Teacher=>Discipline=>

我是用Sum来做的

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问题是，如果您尝试按日期对其进行排序，smth似乎与日期有误

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如何测试此错误？

您不能使用此格式订购日期字符串

按日期值排序：

SELECT DISTINCTROW 
    Format$([Sched].[Date],'Long Date') AS Date, [Sched].[Tacher], [Sched].[Discipline], [Sched].[Type], Sum([Sched].[Hours]) AS [Sum Of Hours]
FROM 
    [Sched]
GROUP BY 
    Format$([Sched].[Date],'Long Date'), [Sched].[Tacher], [Sched].[Discipline], [Sched].[Type]
ORDER BY 
    [Sched].[Date], [Sched].[Tacher], [Sched].[Discipline], [Sched].[Type];

或使用可排序的日期格式：

SELECT DISTINCTROW 
    Format$([Sched].[Date],'yyyy-mm-dd') AS Date, [Sched].[Tacher], [Sched].[Discipline], [Sched].[Type], Sum([Sched].[Hours]) AS [Sum Of Hours]
FROM 
    [Sched]
GROUP BY 
    Format$([Sched].[Date],'yyyy-mm-dd'), [Sched].[Tacher], [Sched].[Discipline], [Sched].[Type];

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调整访问大小可以解决问题吗？因为这里可能有一个字符串比较需要澄清，这个问题只是关于不正确的排序？

SELECT DISTINCTROW 
    Format$([Sched].[Date],'yyyy-mm-dd') AS Date, [Sched].[Tacher], [Sched].[Discipline], [Sched].[Type], Sum([Sched].[Hours]) AS [Sum Of Hours]
FROM 
    [Sched]
GROUP BY 
    Format$([Sched].[Date],'yyyy-mm-dd'), [Sched].[Tacher], [Sched].[Discipline], [Sched].[Type];