SELECT COUNT(DISTINCT `wr_parent`) AS `cnt` FROM g4_write_PDS WHERE ((INSTR(LOWER(wr_subject), LOWER('�뀛�젅@kkrpen1�렂�넗諛붾Ⅴ鍮꾪깉援��궡�뙋留ㅻ꽩酉고깉�쓬�룆諛⑸쾿�렂�넗諛붾Ⅴ鍮꾪깉援��궡�뙋留ㅻ꽩酉고깉�쓬�룆諛⑸쾿'))>0) )
Illegal mix of collations (utf8mb3_general_ci,IMPLICIT) and (euckr_korean_ci,COERCIBLE) for operation 'locate' : 1267