Source

• leetcode: Combine Two Tables

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

MySQL

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