sql2005 ip地址点分十进制与长整形表示法相互转换
在数据库设计时,为了查询效率,常常把点分十进制表示的ip地址设计为bigint类型。存储的时候,怎么把点分十进制转换为bigint,请参考下面的sql自定义函数:
USE [temp]GO/****** 对象: UserDefinedFunction [dbo].[UF_CovertIPToInt] 脚本日期: 08/06/2012 16:55:22 ******/SET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ONGO-- =============================================-- Author:------ Create date: 2009-05-11-- Description:转换ip-- =============================================CREATE FUNCTION [dbo].[UF_CovertIPToInt] (@ip varchar(20))RETURNS bigintASBEGINdeclare @pos intdeclare @sub1 varchar(10)declare @sub2 varchar(10)declare @sub3 varchar(10)declare @sub4 varchar(10)set @pos = charindex('.',@ip)if(@pos<1) return 0set @sub1 = substring(@ip,0,@pos)--select @sub1set @ip = substring(@ip, @pos+1 ,len(@ip) - @pos + 1)--select @ipset @pos = charindex('.',@ip)if(@pos<1) return 0set @sub2 = substring(@ip,0,@pos)--select @sub2set @ip = substring(@ip, @pos+1 ,len(@ip) - @pos + 1)--select @ipset @pos = charindex('.',@ip)if(@pos<1) return 0set @sub3 = substring(@ip,0,@pos)--select @sub3set @ip = substring(@ip, @pos+1 ,len(@ip) - @pos + 1)if(len(@ip)<1) return 0select @sub4 = @ip--select @sub4return cast(@sub1 as bigint ) * 16777216 + cast(@sub2 as bigint ) * 65536 + cast(@sub3 as bigint )*256 + cast(@sub4 as bigint )END
有了上面的函数,我可以方便地进行转换,例如:
select dbo.UF_CovertIPToInt('192.168.1.100') as ip
显示的时候,为了方便阅读,常常需要把bigint转换为点分十进制,请参考下面的自定义函数:
USE [temp]GOSET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ONGOCREATE FUNCTION [dbo].[UF_ConvertIPToStr] (@ip bigint)RETURNS varchar(20)ASBEGINRETURN cast((@ip/16777216)% 256 as varchar(4)) + '.' + cast( (@ip/65536)% 256 as varchar(4)) +'.'+ cast( (@ip/256)%256 as varchar(4))+ '.'+ cast( (@ip%256)as varchar(4))END
可以通过下面的方式调用该函数:
select dbo.UF_ConvertIPToStr (3232235790) as ip