SELECT COUNT(DISTINCT `wr_parent`) AS `cnt` FROM g4_write_PDS WHERE ((INSTR(LOWER(wr_subject), LOWER('�뀛@knem9�뒪�떥�끃�뒪援��궡�뙋留ㅼ븞�씫�궗�빟臾쇱븞�쟾嫄곕옒�뒪�떥�끃�뒪援��궡�뙋留ㅼ븞�씫�궗�빟臾쇱븞�쟾嫄곕옒'))>0) )
Illegal mix of collations (utf8mb3_general_ci,IMPLICIT) and (euckr_korean_ci,COERCIBLE) for operation 'locate' : 1267