数字转换为英文的函数

sys@ORCL> select to_char(to_date('1314','J'),'Jsp') as "I love 1314" from dual;

I love 1314
-----------------------------------
One Thousand Three Hundred Fourteen

         注释： j就是范围在1--5373484之间

         算算是今年的第几天

sys@ORCL> select to_date('123','J')  from dual;

TO_DATE('123','J')
------------------
03-MAY-12