SELECT COUNT(DISTINCT `wr_parent`) AS `cnt` FROM g4_write_column WHERE ((INSTR(wr_subject, '占�0占쏙옙0占쏙옙')>0) and (INSTR(wr_subject, '�댐옙0占�0占쏙옙0占쏙옙0占쏙옙0占�')>0) )
Illegal mix of collations (utf8mb3_general_ci,IMPLICIT) and (euckr_korean_ci,COERCIBLE) for operation 'locate' : 1267