error sql:select * from ( SELECT p.*, a.ADMIN_ACCOUNT, trim(f.SUBJECT) SUBJECT, trim(f.SUBJECT_EN) SUBJECT_EN, u.user_id, u.USER_ACCOUNT, u.USER_NAME, u.USER_ADDRESS, u.USER_TYPE, u.USER_POST, w.EN_FIRST_NAME, w.EN_LAST_NAME, a2.ADMIN_ACCOUNT AS unstreader FROM (T_RELEASE_PAPER p LEFT JOIN T_ADMIN_INFO a ON p.LOCKOR = a.ADMIN_ID) LEFT JOIN T_ADMIN_INFO a2 ON p.UNSTREAD_OPERATOR = a2.ADMIN_ID, T_FIELD_BELONG f, T_USER_INFO u , T_USER_INFO_EN w WHERE p.PAPER_SUBJECT = f.SUBJECT_CODE AND p.OPERATOR = u.USER_ID AND w.USER_ID = u.USER_ID ) where paper_id=4513097