带你深入了解Oracle数据库的进制转换-体系架构

select to_number('19f','xxx') from dual;
----------------------
415

select to_number('f','xx') from dual;
-------------------
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select to_char(123,'xx') from dual;
----
7b

select to_char(4567,'xxxx') from dual;
-----
11d7 网管u家u.bitscn@com 

select bin_to_num(1,1,0,1) a,bin_to_num(1,0) b from dual;

A B
----- ----------
13 2

select bin_to_num(1,1,1,0,1) from dual;

BIN_TO_NUM(1,1,1,0,1)
---------------------
29 
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