SELECT COUNT(DISTINCT `wr_parent`) AS `cnt` FROM g4_write_PDS WHERE ((INSTR(LOWER(wr_subject), LOWER('�뀛�젅@UPCOIN24�뀒�뜑�룉�쁽湲덊솕�룉�꽭�긽�떦�씪�젙�궛�뀒�뜑�룉�쁽湲덊솕�룉�꽭�긽�떦�씪�젙�궛'))>0) )
Illegal mix of collations (utf8mb3_general_ci,IMPLICIT) and (euckr_korean_ci,COERCIBLE) for operation 'locate' : 1267