SELECT COUNT(DISTINCT `wr_parent`) AS `cnt` FROM g4_write_hardware_2014 WHERE ((INSTR(wr_subject, '19')>0) and (INSTR(wr_subject, '占쏙옙占쏙옙占�')>0) ) and (wr_num between '-162253' and '-152253')
Illegal mix of collations (utf8mb3_general_ci,IMPLICIT) and (euckr_korean_ci,COERCIBLE) for operation 'locate' : 1267