SELECT COUNT(DISTINCT `wr_parent`) AS `cnt` FROM g4_write_PDS WHERE ((INSTR(LOWER(wr_subject), LOWER('�뀛�젅@KWVWS洹몃씪紐⑹넀�슚怨쇳렂�넗�뒪�쐞�뒪�젙�뭹洹몃씪紐⑹넀�슚怨쇳렂�넗�뒪�쐞�뒪�젙�뭹'))>0) )
Illegal mix of collations (utf8mb3_general_ci,IMPLICIT) and (euckr_korean_ci,COERCIBLE) for operation 'locate' : 1267