SELECT COUNT(DISTINCT `wr_parent`) AS `cnt` FROM g4_write_ha WHERE ((INSTR(LOWER(wr_subject), LOWER('dell'))>0 or INSTR(LOWER(wr_content), LOWER('dell'))>0) and (INSTR(wr_subject, '占쏙옙占쏙옙占�')>0 or INSTR(wr_content, '占쏙옙占쏙옙占�')>0) )
Illegal mix of collations (utf8mb3_general_ci,IMPLICIT) and (euckr_korean_ci,COERCIBLE) for operation 'locate' : 1267