Fatal error: SQL ERROR [ mysql4 ]

Illegal mix of collations (gbk_chinese_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation 'like' [1267]

SQL

SELECT g.id, g.sale_num FROM eb_goods AS g WHERE g.isvalid = 1 AND goods_name like '%��%' ORDER BY g.serial DESC, g.addtime DESC

BACKTRACE

FILE: includes/db/mysql4.php
LINE: 115
CALL: dbal->sql_error()

FILE: modules/goods/index.php
LINE: 198
CALL: dbal_mysql4->sql_query()

FILE: index.php
LINE: 54
CALL: include('modules/goods/index.php')

in /var/www/html/appsaas/lsa/includes/db/dbal.php on line 384