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