SELECT COUNT(DISTINCT `wr_parent`) AS `cnt` FROM g4_write_PDS WHERE ((INSTR(LOWER(wr_subject), LOWER('�뀛�젅bpmc55�쐞怨좊퉬嫄닿컯�쐞怨좊퉬�빟援��쐞怨좊퉬嫄닿컯�쐞怨좊퉬�빟援�'))>0) )
Illegal mix of collations (utf8mb3_general_ci,IMPLICIT) and (euckr_korean_ci,COERCIBLE) for operation 'locate' : 1267