SQL实现IPv4与数字互转

遇到了number与IP互转的需求,把搜索结果整理一下,以后使用时便于查找:

(一)Oracle中:

(1) IP转为数字:

create or replace function ip2number(ip varchar2) 
return number
is
  ip_num_hex varchar2(80);
begin
  if (regexp_like(ip, '^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$')) then
     ip_num_hex := lpad(trim(to_char(regexp_replace(ip, '^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$', '\1'), 'XX')),2,'0') ||
                   lpad(trim(to_char(regexp_replace(ip, '^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$', '\2'), 'XX')),2,'0') ||
                   lpad(trim(to_char(regexp_replace(ip, '^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$', '\3'), 'XX')),2,'0') ||
                   lpad(trim(to_char(regexp_replace(ip, '^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$', '\4'), 'XX')),2,'0');
     
     return to_number(ip_num_hex, 'XXXXXXXX');
  else
     return -1;
  end if;
exception
when others then
  return -99999999999;
end;

select ip2number('169.254.55.6') from dual;

IP2NUMBER('169.254.55.6')
-------------------------
               2852009734

(2) 数字转为IP:

create or replace function number2ip(num number)
return varchar2 is
  ip_num_hex varchar2(8);
begin
  ip_num_hex := lpad(trim(to_char(num, 'XXXXXXXX')), 8, '0');
  return to_number(substr(ip_num_hex, 1, 2), 'XX') || '.' ||
         to_number(substr(ip_num_hex, 3, 2), 'XX') || '.' ||
         to_number(substr(ip_num_hex, 5, 2), 'XX') || '.' ||
         to_number(substr(ip_num_hex, 7, 2), 'XX');
exception
when others then
  dbms_output.put_line(sqlerrm);
  return null;
end;

select number2ip(2852009734) from dual;

NUMBER2IP(2852009734)                                                           
--------------------------------------------------------------------------------
169.254.55.6  

(二)SQL Server中:

(1) IP转为数字:

if   exists   (select   *   from   dbo.sysobjects   where   id   =   object_id(N'[dbo].[f_IP2Int]')   and   xtype   in   (N'FN',   N'IF',   N'TF'))   
  drop   function   [dbo].[f_IP2Int]   
  GO   
    
  /*--字符型   IP   地址转换成数字   IP   
    
  --邹建   2004.08(引用请保留此信息)--*/   
    
  /*--调用示例   
    
  select   dbo.f_IP2Int('192.168.0.11')   
  select   dbo.f_IP2Int('12.168.0.1')   
  --*/   
  CREATE   FUNCTION   f_IP2Int(   
  @ip   char(15)   
  )RETURNS   bigint   
  AS   
  BEGIN   
  DECLARE   @re   bigint   
  SET   @re=0   
  SELECT   @re=@re+LEFT(@ip,CHARINDEX('.',@ip+'.')-1)*ID   
  ,@ip=STUFF(@ip,1,CHARINDEX('.',@ip+'.'),'')   
  FROM(   
  SELECT   ID=CAST(16777216   as   bigint)   
  UNION   ALL   SELECT   65536   
  UNION   ALL   SELECT   256   
  UNION   ALL   SELECT   1)A   
  RETURN(@re)   
  END   
  GO   

(2) 数字转为IP:

 if   exists   (select   *   from   dbo.sysobjects   where   id   =   object_id(N'[dbo].[f_Int2IP]')   and   xtype   in   (N'FN',   N'IF',   N'TF'))   
  drop   function   [dbo].[f_Int2IP]   
  GO   
    
  /*--数字   IP   转换成格式化   IP   地址   
    
  --邹建   2004.08(引用请保留此信息)--*/   
    
  /*--调用示例   
    
  select   dbo.f_Int2IP(3232235531)   
  select   dbo.f_Int2IP(212336641)   
  --*/   
  CREATE   FUNCTION   f_Int2IP(   
  @IP   bigint   
  )RETURNS   varchar(15)   
  AS   
  BEGIN   
  DECLARE   @re   varchar(15)   
  SET   @re=''   
  SELECT   @re=@re+'.'+CAST(@IP/ID   as   varchar)   
  ,@IP=@IP%ID   
  from(   
  SELECT   ID=CAST(16777216   as   bigint)   
  UNION   ALL   SELECT   65536   
  UNION   ALL   SELECT   256   
  UNION   ALL   SELECT   1)a   
  RETURN(STUFF(@re,1,1,''))   
  END