애러메세지:
mysql_err : 1267 : Illegal mix of collations (utf8_general_ci,IMPLICIT)
         and (euckr_korean_ci,COERCIBLE) for operation 'like'

#] mysql -u root -p
mysql> use realDB;
Database changed

mysql> select * from saju_hanja where hj_hanja like '가';;
Empty set (0.00 sec)

mysql> select hj_hangul from saju_hanja limit 5;
+-----------+
| hj_hangul |
+-----------+
| ?         |
| ?         |
| ?         |
| ?         |
| ?         |
+-----------+
5 rows in set (0.00 sec)

mysql> status
--------------
mysql  Ver 14.12 Distrib 5.0.77, for redhat-linux-gnu (i686) using readline 5.1

Connection id:          1332
Current database:
Current user:           root@localhost
SSL:                    Not in use
Current pager:          stdout
Using outfile:          ''
Using delimiter:        ;
Server version:         5.0.37-log Source distribution
Protocol version:       10
Connection:             Localhost via UNIX socket
Server characterset:    euckr
Db     characterset:    euckr
Client characterset:    latin1
Conn.  characterset:    latin1
UNIX socket:            /tmp/mysql.sock
Uptime:                 1 hour 54 min 38 sec

Threads: 1  Questions: 14097  Slow queries: 85  Opens: 1264  Flush tables: 1  Open tables: 64  Queries per second avg: 2.050
--------------

Server 와 Db characterset: euckr 인데  Client 와 Conn. characterset : latin1 으로 되어있는 경우입니다.

작업 중인 PHP소스파일의 시작부분이나 DB 연결부분에 다음의 한줄을 추가해 줍니다.
mysql_query("SET CHARACTER SET euckr");