Each row of this table indicates the ID of a department and its name. A company's executives are interested in seeing who earns the most money in each of the company's departments. Ahigh earnerin a department is an employee who has a salary in thetop three uniquesalaries for that depart...
if(@cursalry!=Salary,@num+1,@num),1)asnumber,@maxprice:=if(@num=1,@maxprice:=Salary,@maxprice)asmp,@cid:=DepartmentIdasdummy,@cursalry:=Salaryascursfrom(selectDepartmentId, Name ,SalaryfromEmployeeorderbyDepartment
创建表和数据: CreatetableIfNotExistsEmployee (Idint, Namevarchar(255), Salaryint, DepartmentIdint);CreatetableIfNotExistsDepartment (Idint, Namevarchar(255));TruncatetableEmployee;insertintoEmployee (Id, Name, Salary,DepartmentId)values('1','Joe','70000','1');insertintoEmployee (Id, Name, Sa...
For this problem, we can either identify the top earners first using DataFrame employee and then join the DataFrame department to get the department name, or join the DataFrame department first to get the department name before identifying the top earners. In this approach, we use the latter ...
Department Top Three Salaries(各部门工资最高的三个人) 2、题目地址 https://leetcode.com/problems/department-top-three-salaries/ 3、题目内容 表Employee保存了所有雇员的数据,每名雇员都有一个Id,和一个部门Id(DepartmentId) +---+---+---+---+ |Id|Name|Salary|DepartmentId| +...
Write a SQL query to find employees who earn the top three salaries in each of the department. For the above tables, your SQL query should return the following rows. +---+---+---+ | Department | Employee | Salary | +---+---+---+ | IT | Max | 90000 | | IT | Randy | ...
https://leetcode.com/problems/department-top-three-salaries/ 不愧是hard,特别费劲。 一开始想得很简单,就像一个循环一样,外层塞一个DepartmentId给内层,内层去找这个部门下的top3的,轻松愉快。 问题是MySQL不支持这语法Orz. 'This version of MySQL doesn't yet support 'LIMIT & IN/ALL/ANY/SOME subquery...
然而group by以及limit无法满足并列前三名的要求,因此,只能对同张表使用select count,如果某个薪水满足超过其的薪水(注意是不同的薪水)小于三个,则此人薪水在部门前三; 综上所述,答案如下所示: # Write your MySQL query statement belowSELECTEmployee1.NameASEmployee, Employee1.Salary, Department.NameASDepartme...
http://bookshadow.com/weblog/2015/01/24/leetcode-department-top-three-salaries/ 原题: https://leetcode.com/problems/department-top-three-salaries/ 题目描述: The Employee table holds all employees. Every employee has an Id, and there is also a column for the department Id. +---+---+...
leetcode原文引用: How would you print just the 10th line of a file? For example, assume thatfile.txthas the following content: Line 1 Line 2 Line 3 Line 4 Line 5 Line 6 Line 7 Line 8 Line 9 Line 10 Your script should output the tenth line, which is: ...