SQL> select to_number('ff','xxxxx') from dual;TO_NUMBER('FF','XXXXX')
-----------------------
255
SQL> select to_char('255','fmxxxx') from dual;TO_CH
-----
ff
-----------------------
255
SQL> select to_char('255','fmxxxx') from dual;TO_CH
-----
ff
解决方案 »
免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货