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  • 175. 组合两个表

    表1: Person

    +-------------+---------+
    | 列名 | 类型 |
    +-------------+---------+
    | PersonId | int |
    | FirstName | varchar |
    | LastName | varchar |
    +-------------+---------+
    PersonId 是上表主键
    表2: Address

    +-------------+---------+
    | 列名 | 类型 |
    +-------------+---------+
    | AddressId | int |
    | PersonId | int |
    | City | varchar |
    | State | varchar |
    +-------------+---------+
    AddressId 是上表主键
     

    编写一个 SQL 查询,满足条件:无论 person 是否有地址信息,都需要基于上述两表提供 person 的以下信息:

    FirstName, LastName, City, State

    来源:力扣(LeetCode)
    链接:https://leetcode-cn.com/problems/combine-two-tables

    # Write your MySQL query statement below
    select FirstName, LastName, City, State from Person left join Address
    on Person.PersonId=Address.PersonId
    # Write your MySQL query statement below
    select FirstName, LastName, City, State from Person left join Address
    on Person.PersonId=Address.PersonId
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  • 原文地址:https://www.cnblogs.com/xxxsans/p/13660500.html
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