MS Access在兩個日期之間選擇？

我已經搜索過，但所有結果都沒有幫助我理解。MS Access在兩個日期之間選擇？

我需要選擇18-23歲的人的姓名。所以我的嘗試是：

WHERE ((People.Birth) Between (Now()-Year(18)) And (Now()-Year(23)))

我做錯了什麼？解決方案＃some_date＃是一個壞主意！

來源

2016-02-11 Vitali Kuzmin

你是否調查過「Year（18）'實際返回的結果？ –

請參閱[datediff]（https://support.office.com/zh-cn/article/DateDiff-Function-e6dd7ee6-3d01-4531-905c-e24fc238f85f）。 – user2864740

f * ck，很多時候都明白，所有問題都需要在睡眠後解決，而不是在25小時後解決。年份（18）將返回1900 ... 2 user2864740 - 我已經看到它，但它對我沒有幫助（ –

對於一個真正的解決方案，你需要使用使用DateAdd和這樣的功能：

Public Function AgeSimple(_ 
    ByVal datDateOfBirth As Date) _ 
    As Integer 

' Returns the difference in full years from datDateOfBirth to current date. 
' 
' Calculates correctly for: 
' leap years 
' dates of 29. February 
' date/time values with embedded time values 
' 
' DateAdd() is used for check for month end of February as it correctly 
' returns Feb. 28. when adding a count of years to dates of Feb. 29. 
' when the resulting year is a common year. 
' After an idea of Markus G. Fischer. 
' 
' 2007-06-26. Cactus Data ApS, CPH. 

    Dim datToday As Date 
    Dim intAge As Integer 
    Dim intYears As Integer 

    datToday = Date 
    ' Find difference in calendar years. 
    intYears = DateDiff("yyyy", datDateOfBirth, datToday) 
    If intYears > 0 Then 
    ' Decrease by 1 if current date is earlier than birthday of current year 
    ' using DateDiff to ignore a time portion of datDateOfBirth. 
    intAge = intYears - Abs(DateDiff("d", datToday, DateAdd("yyyy", intYears, datDateOfBirth)) > 0) 
    End If 

    AgeSimple = intAge 

End Function

然後你的查詢就會有這個其中子句：

WHERE AgeSimple(People.Birth) Between 18 And 23

來源

2016-02-11 07:04:39 Gustav

哇。 –

最後解決它通過簡單的

WHERE ((People.Birth) Between (Now()- 365*18) And (Now()-365*23))

如果你有更好的解決方案 - 歡迎

來源

2016-02-11 05:24:01

太簡單了， – Gustav

MS Access在兩個日期之間選擇？

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