596.查询至少有5个学生的所有班级 建表插入数据: Create table If Not Exists Courses (student varchar(255), class varchar(255))Truncate table Coursesinsert into Courses (student, class) values ('A', 'Math')insert into
因为数据有重复所以回溯法会给出重复的结果,需要set去重复。 class Solution {public:/*** @param nums: an integer array* @return: all the different possible increasing subsequences of the given array*/set<vector<int>> judge;vecto
Problem: 570. 至少有5名直接下属的经理 👨🏫 参考题解 🍻子查询 select name from Employeewhere id in(select managerId from Employee group by managerId having managerId != 'null' and count(*) >= 5); 🍻 join 虚拟
13-至少有5名直接下属的经理 select namefrom Employee where id in (select managerId -- 查找大于5的经理idfrom Employeegroup by managerId -- 根据id分组having count(*)>=5); -- 根据分组的数据进行求个数
ActorDirector 表: +-------------+---------+| Column Name | Type |+-------------+---------+| actor_id | int || director_id | int || timestamp | int |+-------------+---------+