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SELECT COUNT(DISTINCT `wr_parent`) AS `cnt` FROM g4_write_unbox WHERE ((INSTR(wr_subject, '而⑨옙0占�0占쎌씠占�0占�0占쏙옙0占쎌뒪吏�')>0) )
Illegal mix of collations (utf8mb3_general_ci,IMPLICIT) and (euckr_korean_ci,COERCIBLE) for operation 'locate' : 1267