分享程序员开发的那些事...
更新时间：2022-12-03 23:02:59
SELECT `id`, `ip`,
SUBSTRING_INDEX( `ip` , '.', 1 ) AS a,
SUBSTRING_INDEX(SUBSTRING_INDEX( `ip` , '.', 2 ),'.',-1) AS b,
SUBSTRING_INDEX(SUBSTRING_INDEX( `ip` , '.', -2 ),'.',1) AS c,
SUBSTRING_INDEX( `ip` , '.', -1 ) AS d
FROM unicorns
示例
SET @ip = '192.168.1.1';
SELECT @ip,
SUBSTRING_INDEX( @ip , '.', 1 ) AS a,
SUBSTRING_INDEX(SUBSTRING_INDEX( @ip , '.', 2 ),'.',-1) AS b,
SUBSTRING_INDEX(SUBSTRING_INDEX( @ip , '.', -2 ),'.',1) AS c,
SUBSTRING_INDEX( @ip , '.', -1 ) AS d
结果
| @IP | A | B | C | D |
-----------------------------------
| 192.168.1.1 | 192 | 168 | 1 | 1 |