将Unicode字符串转换为十六进制

Question

我想将Unicode字符串转换为十六进制。

换句话说，我需要将أحمد之类的字符串转换为：

0xC3CDE3CF0000000000000000000000000000000000000000000000000000

Answer 1

尝试：

select rawtohex(convert('أحمد','AR8ISO8859P6','AL32UTF8')) 
from dual;

Here is a sqlfiddle demo

Answer 2

select rawtohex(col) from table