Stay button sql problem

A combination of the two tables

Table 1: Person

+ ------------- + --------- +
| Column Name | Type |
+ ------------- + ---- + -----
| PersonId | int |
| FirstName | VARCHAR |
| LastName | VARCHAR |
+ ------------- + --------- +
PersonId is on the table primary key
table 2: Address

+ ------------- + --------- +
| Column Name | Type |
+ ------------- + ---- + -----
| AddressID | int |
| PersonId | int |
| City | VARCHAR |
| State | VARCHAR |
+ ------------- + --------- +
AddressID table is a primary key
 

Write a SQL query, the condition: no matter whether the person has address information, we need to provide the following information based on the person of two tables:

 Construction of the table statement:

Create table Person (PersonId int, FirstName varchar(255), LastName varchar(255))
Create table Address (AddressId int, PersonId int, City varchar(255), State varchar(255))
Truncate table Person
insert into Person (PersonId, LastName, FirstName) values ('1', 'Wang', 'Allen')
Truncate table Address
insert into Address (AddressId, PersonId, City, State) values ('1', '2', 'New York City', 'New York')

　　solution:

select FirstName, LastName, City, State
from Person left join Address
on Person.PersonId = Address.PersonId

　　

FirstName, LastName, City, State

Source: stay button (LeetCode)
link: https: //leetcode-cn.com/problems/combine-two-tables
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