在SQL如何将一个长度是10位bigint型的数值转换成IP形式
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将长整型转换为IP地址
Name: Convert LongIP to StringIP
Description: This function converts a Long Number (3232235521) into an IP Address ("192.168.0.1"). Why would you want to do this? Click here.
Inputs: anNewIP - IP Address as a Long Number (no dots)
Returns: Returns the string representation of an IP Address ("192.168.0.1")
Function CStrIP(ByVal anNewIP)
Dim lsResults ' Results To be returned
Dim lnTemp ' Temporary value being parsed
Dim lnIndex ' Position of number being parsed
' If pulling number from an Access Database,
' The variable Type "Long" ranges from -21474838 To 21474837
' You will first need To add 21474838 to the number to parse correctly.
' anNewIP = anNewIP + 21474838
' Parse highest numbers first
For lnIndex = 3 To 0 Step -1
' Parse the current value For this position
lnTemp = Int(anNewIP / (256 ^ lnIndex))
' Append the number To the final results delimited by a dot
lsResults = lsResults & lnTemp & "."
' Remove the number that we just parsed
anNewIP = anNewIP - (lnTemp * (256 ^ lnIndex))
Next
' Cut off last dot
lsResults = Left(lsResults, Len(lsResults) - 1)
' Return the results
CStrIP = lsResults
End Function
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为什么不用varchar储存呢一开始
