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全部文章（共102篇）

题解 | 统计每个产品的销售情况

with t2 as( select o.*, c.customer_age, month(o.order_date) as order_month from orders o left join customers c on ...

2025-03-25

0 40

题解 | 每个顾客最近一次下单的订单信息

select t.order_id, t.customer_name, t.order_date from (select o.order_id, c.customer_name, o.order_date, ...

2025-03-25

0 29

题解 | 商品id数据清洗统计

select substr(order_id,instr(order_id,'_')+1,4) as product_id, count(*) as cnt from order_log group by substr(order_id,instr(order_id,'_')+1,4) ...

2025-03-25

0 35

题解 | 查询订单

with newest_order as (select c.customer_name, o.order_id, o.order_date, row_number() over(partition by o.customer_id order by o.order_date de...

2025-03-25

0 31

题解 | top2的薪水排名

with ranking as( select department, employee_name, salary, rank() over(partition by department order by salary d...

2025-03-25

0 40

题解 | 每个部门薪资排名前两名员工

with ranking as(select *, rank() over(partition by department order by salary desc) as rank_number from employees) select department, ...

2025-03-25

0 34

题解 | 每个客户的账户总金额

select customer_id, sum(balance) as sum_balance from account group by customer_id order by sum_balance desc,customer_id asc

2025-03-25

0 36

题解 | 商品销售总额分布

select t1.pay_method, count(*) as cnt from (select case when u.pay_method<>'' then u.pay_method else 'error' end as pay_method from user_client...

2025-03-25

0 32

题解 | 商品销售排名

select p.product_name, p.price*count(p.product_name) as total_sales from user_client_log u left join product_info p on u.product_id=p.product_id where...

2025-03-24

0 34

题解 | 商品价格排名

select t1.product_id, t1.product_name, t1.type, t1.price from (select product_id, product_name, type, ...

2025-03-24

0 19