Getting started with SQL - combined tables

surface : Person

+-------------+---------+
| Name         | type     |
+-------------+---------+
| PersonId    | int     |
| FirstName   | varchar |
| LastName    | varchar |
+-------------+---------+
personId Is the primary key column of the table .
This table contains some people's ID And their last and first names .
 

surface : Address

+-------------+---------+
| Name         | type    |
+-------------+---------+
| AddressId   | int     |
| PersonId    | int     |
| City        | varchar |
| State       | varchar |
+-------------+---------+
addressId Is the primary key column of the table .
Each row of the table contains a ID = PersonId Information about people's cities and states .
 

Write a SQL Query to report Person The last name of each person in the list 、 name 、 Cities and states . If personId Your address is not in  Address  In the table , The report is empty  null .

With In any order Return result table .

The query result format is as follows .

Example 1:

Input : 
Person surface :
+----------+----------+-----------+
| personId | lastName | firstName |
+----------+----------+-----------+
| 1        | Wang     | Allen     |
| 2        | Alice    | Bob       |
+----------+----------+-----------+
Address surface :
+-----------+----------+---------------+------------+
| addressId | personId | city          | state      |
+-----------+----------+---------------+------------+
| 1         | 2        | New York City | New York   |
| 2         | 3        | Leetcode      | California |
+-----------+----------+---------------+------------+
Output : 
+-----------+----------+---------------+----------+
| firstName | lastName | city          | state    |
+-----------+----------+---------------+----------+
| Allen     | Wang     | Null          | Null     |
| Bob       | Alice    | New York City | New York |
+-----------+----------+---------------+----------+
explain : 
There is no personId = 1 The address of , So their cities and States return null.
addressId = 1 Contains personId = 2 Address information for .

source ： Power button （LeetCode）
link ：https://leetcode.cn/problems/combine-two-tables
Copyright belongs to the network . For commercial reprint, please contact the official authority , Non-commercial reprint please indicate the source .

The connection of data table is :

1、 Internal connection ( Natural join ): Only rows that match two tables can appear in the result set
2、 External connection : Include
（1） The left outer join ( The table on the left is unrestricted )
（2） Right connection ( The table on the right is unrestricted )
（3） Full outer join ( There are no restrictions on the left and right tables )
3、 Self join ( The connection occurs in a base table )
All in all ：
The left link shows all on the left and the same on the right and left .
The right connection shows all on the right and the same on the left and right .
The inner connection is to show only the parts that meet the conditions .

# Write your MySQL query statement below
select A.FirstName,A.LastName,B.City,B.State
FROM Person A left join Address B
on A.PersonId=B.PersonId