Access月初，月末，本月天数的函数
时间：2009-05-06 08:57 来源：网络 作者：Grant 阅读：次
月初，月末，本月天数的函数
accessQQ.com 2003-12-29
'? firstDayOfMonth("2003-2-4")
' 2003-2-1
'? lastDayOfMonth("2003-2-4")
' 2003-2-28
'? DaysInMonth("2003-2-4")
' 28
Function firstDayOfMonth(myDate As Date) As Date
firstDayOfMonth = Cdate(Format(myDate, "yyyy-m-1"))
End Function
Function lastDayOfMonth(myDate As Date) As Date
lastDayOfMonth = DateAdd("d", -1, DateAdd("M", 1, firstDayOfMonth(myDate)))
End Function
Function DaysInMonth(myDate As Date) As Integer
DaysInMonth = DateDiff("d", firstDayOfMonth(myDate), lastDayOfMonth(myDate)) + 1
End Function
accessQQ.com 2003-12-29
'? firstDayOfMonth("2003-2-4")
' 2003-2-1
'? lastDayOfMonth("2003-2-4")
' 2003-2-28
'? DaysInMonth("2003-2-4")
' 28
Function firstDayOfMonth(myDate As Date) As Date
firstDayOfMonth = Cdate(Format(myDate, "yyyy-m-1"))
End Function
Function lastDayOfMonth(myDate As Date) As Date
lastDayOfMonth = DateAdd("d", -1, DateAdd("M", 1, firstDayOfMonth(myDate)))
End Function
Function DaysInMonth(myDate As Date) As Integer
DaysInMonth = DateDiff("d", firstDayOfMonth(myDate), lastDayOfMonth(myDate)) + 1
End Function
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