来源:力扣(LeetCode) 链接:https://leetcode.cn/problems/all-the-pairs-with-the-maximum-number-of-common-followers #测试数据 Create table If Not Exists Relations (user_id int, follower_id int); insert into Relations (user_id, follower_id) values ('1', '3'); insert into Relations (user_...
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d) 建表SQL CreatetableIfNotExistsEmployee(Idint,Namevarchar(255),Salaryint,DepartmentIdint)CreatetableIfNotExistsDepartment(Idint,Namevarchar(255))TruncatetableEmployeeinsertintoEmployee(Id,Name,Salary,DepartmentId)values('1','Joe','85000','1')insertintoEmployee(Id,Name,Salary,DepartmentId)values('...
来源:力扣(LeetCode) 链接:https://leetcode.cn/problems/all-the-pairs-with-the-maximum-number-of-common-followers #测试数据 Create table If Not ExistsRelations(user_id int,follower_id int);insert intoRelations(user_id,follower_id)values('1','3');insert intoRelations(user_id,follower_id)valu...
链接:https://leetcode-cn.com/problems/all-people-report-to-the-given-manager 著作权归领扣网络所有。商业转载请联系官方授权,非商业转载请注明出处。 题解 使用左连接 由于有一条总经理归总经理管,所以治需要where e3.manager_id = 1 代码 # Write your MySQL query statement belowselecte1.employee_idas...
Leetcode中的SQL题目练习(一) 595. Big Countries https://leetcode.com/problems/big-countries/description/ Description A country is big if it has an area of bigger than 3 million square km or a population of more than 25 million. Write a SQL solution to output big countries’ name, ...
leetlab11 / SQL-ALL-sorted-Difficulty Star 19 Code Issues Pull requests SQL Database questions from LeetCode- as many as I can solve sorted by difficulty; current problems solved- 192 sql database leetcode leetcode-solutions leetcode-questions leetcode-practice leetcode-sql leetcode-data...
链接:https://leetcode-cn.com/problems/find-cumulative-salary-of-an-employee 著作权归领扣网络所有。商业转载请联系官方授权,非商业转载请注明出处。 代码中使用一个范围连表,在使用最小月份去重最后一个月 # Write your MySQL query statement below ...
二维差分数组 CPP_LANG SQLAbout This repository contains the solutions and explanations to the algorithm problems on LeetCode. Only medium or above are included. All are written in C++/Python and implemented by myself. The problems attempted multiple times are labelled with hyperlinks. Topics algor...
https://leetcode-cn.com/problems/duplicate-emails/ Write a SQL query to find all duplicate emails in a table namedPerson. 题意 编写一个 SQL 查询,查找 Person 表中所有重复的电子邮箱。 解题 此题比较简单,寻找重复的数据即可,用group by Email分组后 数据个数大于1的就是重复的 。向 GROUP BY 添...