oracle数据去重

方法一：

 

delete
from pornpages t1
where t1.rowid>(select min(t2.rowid) from pornpages t2 where t1.recordid=t2.recordid)

 

 

方法二：

delete
from pornpages
where rowid not in(select min(rowid) from pornpages group by recordid)

 

推荐方法一