Tags: "leetcode", "sql", access_time 1-min read

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Combine Two Tables

Created: September 10, 2018 by [lek-tin]

Last updated: April 6, 2020

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

Solution

SELECT
    FirstName, LastName, City, State
FROM
    Person
LEFT JOIN
    Address
ON Person.PersonId = Address.PersonId