Combine Two Tables

本文提供了一个SQL查询示例,展示了如何使用左连接(LEFT JOIN)从Person表中获取人员信息,并尝试从Address表中匹配对应的地址详情,即使某些人员没有地址记录也能确保每个人的信息都能被列出。

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Table: Person

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

Table: Address

+-------------+---------+
| Column Name | Type    |
+-------------+---------+
| AddressId   | int     |
| PersonId    | int     |
| City        | varchar |
| State       | varchar |
+-------------+---------+
AddressId is the primary key column for this table.

Write a SQL query for a report that provides the following information for each person in the Person table, regardless if there is an address for each of those people:

FirstName, LastName, City, State

# Write your MySQL query statement below
select FirstName,LastName, City,State from Person p left join Address ad on p.PersonId = ad.PersonId




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