首先，来构造一些数据

drop table test;
create table test
(
       name varchar2(10),
       account number(5)
);

insert into test values ('张三','5');
insert into test values ('王五','10');
insert into test values ('小二','10');
insert into test values ('李四','20');
insert into test values ('小三','40');
insert into test values ('小四','50');
insert into test values ('小五','90');
insert into test values ('小六','90');
insert into test values ('小七','90');
commit;

下面来看一下一些方式的排名结果：

1.  select     t.*,dense_rank() over(order by t.account asc)   排名   from test t;

2. select   t.*,dense_rank() over(order by t.account desc) 排名    from  test t;

3. select t.*,rank() over(order by t.account asc) 排名 from test t;

4. select t.*,rank() over(order by t.account desc) 排名 from test t;