oracle_16進(jìn)制與10進(jìn)制轉(zhuǎn)換小示例

--16進(jìn)制轉(zhuǎn)10進(jìn)制,用to_number,里面的參數(shù)是16進(jìn)制的數(shù)據(jù),且參數(shù)用單引號(hào)括起
SQL> select to_number('ff','xx') from dual;
 
TO_NUMBER('FF','XX')
--------------------
                 255
 
--10進(jìn)制轉(zhuǎn)16進(jìn)制,用to_char,里面的參數(shù)是10進(jìn)制的數(shù)據(jù),且參數(shù)不用單引號(hào)括起
SQL> select to_char(255,'xx') from dual;
 
TO_CHAR(255,'XX')
-----------------
 ff
 
--如下報(bào)錯(cuò)因?yàn)橐D(zhuǎn)換的16進(jìn)制的數(shù)據(jù)寬度與格式串的xx寬度不一樣
SQL> select to_number('10effff','xx') from dual;
 
select to_number('10effff','xx') from dual
 
ORA-01722: 無(wú)效數(shù)字
 
--續(xù)上,修正二者寬度一致,不再報(bào)錯(cuò)
SQL> select to_number('10effff','xxxxxxx') from dual;
 
TO_NUMBER('10EFFFF','XXXXXXX')
------------------------------
                      17760255
 

--格式串的寬度>=要轉(zhuǎn)化的數(shù)據(jù)寬度也可以
SQL> select to_number('10effff','xxxxxxx') from dual;
 
TO_NUMBER('10EFFFF','XXXXXXX')
------------------------------
                      17760255
 
SQL> select to_number('e','xxxxxxx') from dual;
 
TO_NUMBER('E','XXXXXXX')
------------------------
                      14

 
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原文鏈接：https://blog.csdn.net/w892824196/article/details/98938379