想到就去做

题解

/ 注册

全部文章 / 题解（共41篇）

题解 | #获得积分最多的人(三)#

select u.id,u.name,c.sp grade_sumfrom (select b.user_id,b.sp,rank()over(order by b.sp desc) r from (select a.user_id,sum(a.p) sp from ...

2021-09-07

0 272

题解 | #牛客的课程订单分析(七)#

select source,count()from (select oi.,(case when oi.is_group_buy = 'Yes' then 'GroupBuy' else c.name end) source, count(*)over(partition by user_...

2021-09-07

1 311

题解 | #对于employees表中，给出奇数行的first_name#

select first_namefrom (select first_name,rank()over(order by first_name)rk from employees order by emp_no) twhere rk%2 = 1;

2021-09-07

1 311

题解 | #汇总各个部门当前员工的title类型的分配数目#

select d.dept_no,d.dept_name,t.title, count(*) countfrom departments djoin dept_emp deon d.dept_no = de.dept_nojoin titles ton de.emp_no = t.emp...

2021-09-07

1 289

题解 | #获得积分最多的人(二)#

select user.id,user.name, t.grade_sum from (select user_id,sum(grade_num)over(partition by user_id) grade_sumfrom grade_info) t join useron t.user_id ...

2021-09-07

1 383

题解 | #牛客每个人最近的登录日期(四)#

select login_date date, sum(case when login_date = first_date then 1 else 0 end) newfrom (select date login_date, min(date)over(partition ...

2021-09-07

1 406

题解 | #获取员工其当前的薪水比其manager当前薪水还高的相关信息#

select es.emp_no, ms.manager_no, es.emp_salary, ms.manager_salaryfrom(select de.dept_no,de.emp_no emp_no,s.salary emp_salaryfrom dep...

2021-09-06

1 440

题解 | #牛客每个人最近的登录日期(六)#

select u.name u_n,p.date date, sum(p.number)over(partition by p.user_id order by date) ps_numfrom passing_number p left join user uon p.user_id ...

2021-09-06

1 380

题解 | #牛客的课程订单分析(四)#

select user_id,min(date) first_buy_date,cntfrom (select , count()over(partition by user_id) cnt from order_info where status = 'completed'...

2021-09-04

1 414

题解 | #牛客每个人最近的登录日期(二)#

select u.name u_n,c.name c_name,t.date datefrom (select *,max(date)over(partition by user_id) t_maxfrom login) tjoin user uon t.user_id = u.idjoin cli...

2021-09-04

1 318