잘 가지고 놀아보겠습니다...ㅎㅎ
SELECT COUNT(DISTINCT `wr_parent`) AS `cnt` FROM g4_write_unbox WHERE ((INSTR(wr_subject, '�끂占�0占쏙옙占�0占�')>0) and (INSTR(wr_subject, '占�0')>0) )
Illegal mix of collations (utf8mb3_general_ci,IMPLICIT) and (euckr_korean_ci,COERCIBLE) for operation 'locate' : 1267