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LeetCode 175 Combine Two Tables mysql,left join 难度:0

https://leetcode.com/problems/combine-two-tables/ Combine Two Tables Table: Person +-------------+---------+ | Column Name | Type | +-------------+---------+ | PersonId | int | | FirstName | varchar | | LastName | varchar | +-------------+---------+…

LeetCode 175. Combine Two Tables 【MySQL中连接查询on和where的区别】

一.题目 175. Combine Two Tables 二.分析 连接查询的时候要考虑where和on的区别 where : 查询时,连接的时候是必须严格满足条件的,满足了才会加入到临时表中. on : 查询时,考虑要满足这个条件,如果不满足则不会添加连接的表中的数据. 三.AC代码 SELECT FirstName, LastName, City, State FROM Person p LEFT JOIN Address a ON p.PersonID = a.PersonID;…

[Leetcode|SQL] Combine Two Tables

Table: Person +-------------+---------+ | Column Name | Type | +-------------+---------+ | PersonId | int | | FirstName | varchar | | LastName | varchar | +-------------+---------+ PersonId is the primary key column for this table. Table: Address +--…

[LeetCode] Combine Two Tables 联合两表

Table: Person +-------------+---------+ | Column Name | Type | +-------------+---------+ | PersonId | int | | FirstName | varchar | | LastName | varchar | +-------------+---------+ PersonId is the primary key column for this table. Table: Address +--…

[leetcode]Combine Two Tables

leetcode竟然有sql的题了..两道简单的应该会做 这个题主要就是一个left join... # Write your MySQL query statement below SELECT Person.FirstName, Person.LastName, Address.City, Address.State FROM Person LEFT JOIN Address ON Person.PersonId = Address.PersonId;…

LeeCode(Database)-Combine Two Tables

Table: Person +-------------+---------+ | Column Name | Type | +-------------+---------+ | PersonId | int | | FirstName | varchar | | LastName | varchar | +-------------+---------+ PersonId is the primary key column for this table. Table: Address +--…

Leetcode 175. Combine Two Tables

Table: Person +-------------+---------+ | Column Name | Type | +-------------+---------+ | PersonId | int | | FirstName | varchar | | LastName | varchar | +-------------+---------+ PersonId is the primary key column for this table. Table: Address +--…

Combine Two Tables

Table: Person +-------------+---------+ | Column Name | Type | +-------------+---------+ | PersonId | int | | FirstName | varchar | | LastName | varchar | +-------------+---------+ PersonId is the primary key column for this table. Table: Address +--…

175. Combine Two Tables【LeetCode】-LEFT JON 和RIGHT JOIN，两张表关联查询-java -sql入门

Table: Person +-------------+---------+ | Column Name | Type | +-------------+---------+ | PersonId | int | | FirstName | varchar | | LastName | varchar | +-------------+---------+ PersonId is the primary key column for this table. Table: Address +--…

[SQL]LeetCode175. 组合两个表 | Combine Two Tables

Table: Person +-------------+---------+ | Column Name | Type | +-------------+---------+ | PersonId | int | | FirstName | varchar | | LastName | varchar | +-------------+---------+ PersonId is the primary key column for this table. Table: Address +--…