1082.编写解决方案，找出总销售额最高的销售者，如果有并列的，就都展示出来。

题目链接：

https://leetcode.cn/problems/sales-analysis-i/description/

建表插入数据：

Create table If Not Exists Product (product_id int, product_name varchar(10), unit_price int)
Create table If Not Exists Sales (seller_id int, product_id int, buyer_id int, sale_date date, quantity int, price int)
Truncate table Product
insert into Product (product_id, product_name, unit_price) values ('1', 'S8', '1000')
insert into Product (product_id, product_name, unit_price) values ('2', 'G4', '800')
insert into Product (product_id, product_name, unit_price) values ('3', 'iPhone', '1400')
Truncate table Sales
insert into Sales (seller_id, product_id, buyer_id, sale_date, quantity, price) values ('1', '1', '1', '2019-01-21', '2', '2000')
insert into Sales (seller_id, product_id, buyer_id, sale_date, quantity, price) values ('1', '2', '2', '2019-02-17', '1', '800')
insert into Sales (seller_id, product_id, buyer_id, sale_date, quantity, price) values ('2', '2', '3', '2019-06-02', '1', '800')
insert into Sales (seller_id, product_id, buyer_id, sale_date, quantity, price) values ('3', '3', '4', '2019-05-13', '2', '2800')

画图分析：

代码实现：

with t1 as (
    select seller_id,rank() over (order by sum(price) desc) as rn  from
                 sales group by seller_id
) select seller_id from t1 where t1.rn=1;

总结

有并列的要展现出来，可以用rank()或者dense_rank()
序号（排名）函数：
row_number():排序无重复且连续，例如：1，2，3
rank()：排序重复且不连续，例如：1，1，3
dense_rank()：排序重复且连续，例如：1，1，2