SQL中与IP相关的常见问题

1:得到客户端的IP地址
/************* IP  **************/
declare @ip varchar(20),@hst varchar(20),@sql varchar(100)
declare @str varchar(100)
set @str='PING '+Host_Name()
create table #tmp(aa varchar(200))
insert #tmp exec master..xp_cmdshell @str
select top 1 @ip = replace(left(aa,charindex(':',aa)-1),'Reply from ','')
   from #tmp where aa like 'reply from %:%'
drop table #tmp
select @ip

2:得到网卡的物理地址
create table #tb(re varchar(255))
insert into #tb exec master..xp_cmdshell 'ipconfig /all'

select 网卡物理地址=substring(re,charindex(':',re)+1,255) from #tb where re like '%Physical Address. . . . . . . . . :%'

drop table #tb

3:    将IP地址段转成每三位用点号分开   
create function getIP(@a varchar(15))
returns varchar(15)
As
begin
declare @s varchar(15)
set @s = ''
while charindex('.',@a) > 0
begin
 set @s = @s + right('000' + left(@a,charindex('.',@a)),4)
 set @a = right(@a,len(@a)-charindex('.',@a))
end
set @s = @s + right('000' + @a,3)
return @s
end

/*
Select dbo.getIP('202.1.110.2')
---------------
202.001.110.002

（所影响的行数为 1 行）
*/
--drop function getIP