【Oracle】oracle利用正则表达式拆分IP地址

使用oracle提供的regexp_substr()函数，对将IPV4地址分成4段：

select
       v.ip as ip_address,
       regexp_substr(v.ip,'[^.]+',1,1) as A,
       regexp_substr(v.ip,'[^.]+',1,2) as B,
       regexp_substr(v.ip,'[^.]+',1,3) as C,
       regexp_substr(v.ip,'[^.]+',1,4) as D
from (select '192.168.253.183' as ip from dual) v

结果如下：

--------------------------------------------------------------