SELECT COUNT(DISTINCT `wr_parent`) AS `cnt` FROM g4_write_ad_board WHERE ((INSTR(wr_subject, '占�0占쎌뭅占�0占�0占�')>0 or INSTR(wr_content, '占�0占쎌뭅占�0占�0占�')>0) )
Illegal mix of collations (utf8mb3_general_ci,IMPLICIT) and (euckr_korean_ci,COERCIBLE) for operation 'locate' : 1267