175 Combine Two Tables 組合兩個表

Description:
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

題目描述:
表1: Person

+-------------+---------+
| 列名         | 類型    |
+-------------+---------+
| PersonId    | int     |
| FirstName   | varchar |
| LastName    | varchar |
+-------------+---------+

PersonId 是上表主鍵
表2: Address

+-------------+---------+
| 列名         | 類型    |
+-------------+---------+
| AddressId   | int     |
| PersonId    | int     |
| City        | varchar |
| State       | varchar |
+-------------+---------+

AddressId 是上表主鍵

編寫一個 SQL 查詢，滿足條件：無論 person 是否有地址信息，都需要基于上述兩表提供 person 的以下信息：

FirstName, LastName, City, State

思路:

LEFT JOIN

代碼:
MySQL:

# Write your MySQL query statement below
SELECT FirstName, LastName, City, State FROM Person LEFT JOIN Address ON Person.PersonId = Address.PersonId