[1076] 项目员工II
- GitHub
- http://leetcode.xuezhisd.top/post/30906314.html
- https://leetcode.com/problems/project-employees-ii
- https://leetcode-cn.com/problems/project-employees-ii
题目描述
Table: Project
+-------------+---------+
| Column Name | Type |
+-------------+---------+
| project_id | int |
| employee_id | int |
+-------------+---------+
主键为 (project_id, employee_id)。
employee_id 是员工表 Employee 表的外键。
Table: Employee
+------------------+---------+ | Column Name | Type | +------------------+---------+ | employee_id | int | | name | varchar | | experience_years | int | +------------------+---------+ 主键是 employee_id。
编写一个SQL查询,报告所有雇员最多的项目。
查询结果格式如下所示:
Project table: +-------------+-------------+ | project_id | employee_id | +-------------+-------------+ | 1 | 1 | | 1 | 2 | | 1 | 3 | | 2 | 1 | | 2 | 4 | +-------------+-------------+ Employee table: +-------------+--------+------------------+ | employee_id | name | experience_years | +-------------+--------+------------------+ | 1 | Khaled | 3 | | 2 | Ali | 2 | | 3 | John | 1 | | 4 | Doe | 2 | +-------------+--------+------------------+ Result table: +-------------+ | project_id | +-------------+ | 1 | +-------------+ 第一个项目有3名员工,第二个项目有2名员工。
题目解析
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方法二:[算法名称]
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