Oracle最大连续访问天数

一个用户访问页面，页面可以返回继续访问（如A-B-C-A-B-A），求每个用户访问一个页面的最大连续天数，
user_id      url        date
001            A          2020-07-01 00:09:01
001            B          2020-07-01 00:10:01
001            B          2020-07-01 00:10:22
001            A          2020-07-01 00:11:22
001            B          2020-07-01 00:12:20
001            A          2020-07-01 00:13:02
002              ................................



..

select e.user_id, e.url, max(ss)
  from (select d.user_id, d.url, d.cn, count(1) ss
          from (select c.*, c.dt - rn cn
                  from (select b.*,
                               row_number() over(partition by b.user_id, b.url order by dt) rn
                          from (select distinct a.user_id,
                                                a.url,
                                                trunc(to_date(dt,
                                                              'yyyy-mm-dd hh24:mi:ss')) dt
                                  from urlrecords a) b) c) d
         group by d.user_id, d.url, d.cn) e
 group by e.user_id, e.url



网页日志记录表 urlrecord
create table urlrecord
(
id string,
url string,
action string,
)
partitioned by(dt string);
样例数据：
id url action dt
1   www.sohu.com         view      20201001 
2   www.baidu.com        click     20201001 
3   www.baidu.com        click     20201001 
4   www.bilibili.com     click     20201001 
5   www.sohu.com         click     20201002 
6   www.qq.com           click     20201002 
.. .. .. ..


题目： 求该表中每天的url被点击（action='click'）次数最多的top 5
输出数据格式 dt,url,pv(点击总数),rank（排名）
注意，如果有排名相同的，rank 排名取相同的值，后一位递增，比如 1 2 3 3 5 ，或者 1 2 3 4 5 5 等
结果数据示例:

dt url pv   rank
20201001 www.58.com      3641   1 
20201001 www.qq.com      3637   2 
20201001 www.douban.com  3634   3 
20201001 www.jd.com      3606   4 
20201001 www.baidu.com   3574   5 
20201001 www.youku.com   3574   5 
20201002 www.jd.com      3643   1 



select b.*, rank() over(partition by b.url, b.dt order by pv desc) rank
  from (select a.dt, a.url, count(1) pv
          from urlrecord a
         where a.action = 'click'
         group by a.url, a.dt) b