当查询一段sql时速度很快只需要十多秒,但是我把把sql的输入插入临时表中速度很慢很慢几乎要用十多分钟查询时用了如下hints:select/*+driving_site(t1) all_rows parallel(t1,4)*/ from table.插入临时表用:insert into tableselect/*+driving_site(t1) all_rows parallel(t1,4)*/ from table.