SELECT COUNT(DISTINCT `wr_parent`) AS `cnt` FROM g4_write_QnA WHERE ((INSTR(LOWER(wr_subject), LOWER('usb'))>0) and (INSTR(wr_subject, '占�0占쏙옙0占�')>0) and (INSTR(wr_subject, '�떒占�')>0) ) and (wr_num between '-118947' and '-108947')
Illegal mix of collations (utf8mb3_general_ci,IMPLICIT) and (euckr_korean_ci,COERCIBLE) for operation 'locate' : 1267