Combine Two Tables

• LeetCode: Combine Two Tables

• Problems:

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

• Analysis:

From problem description, 'regardless if there is an address for each of those people', we can know it's "LEFT OUTER JOIN".

SELECT: Person.FristName, Person.LastName, Address.City, Address.State

FROM: Person LEFT JOIN Address ON Person.personId=Address.personId

• SQL:

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