exp user/passwd statistics=none compress=n file=/oradata/info/backup/article/article_$i.dmp log=/oradata/info/backup/article/article_$i.log consistent=y tables=fsm_right_article query=\"where articleid in \(select articleid from \(select rownum as r_n\, article\.articleid from \(select articleid from fsm_right_article order by articleid desc\) article where rownum \<= 2400\) where r_n \> 0\)\"