查看临时表空间占用最多的用户与SQL

select sess.username, sql.sql_text, sort1.blocks 
  from v$session sess, v$sqlarea sql, v$sort_usage sort1 
where sess.serial# = sort1.session_num 
   and sort1.sqladdr = sql.address 
   and sort1.sqlhash = sql.hash_value  and sort1.blocks > 200;