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：
### 1. use LEFT JOIN
SELECT Person.FirstName, Person.LastName, Address.City, Address.State
FROM Person
LEFT JOIN Address
ON Person.PersonId = Address.PersonId;
### 2. use keyword USING
SELECT Person.FirstName, Person.LastName, Address.City, Address.State
FROM Person
LEFT JOIN Address
USING(PersionId);
Reference:
