SQK Server實現 LeetCode 175 組合兩個表

175. 組合兩個表

SQL架構
表1: Person

+-------------+---------+
| 列名         | 類型     |
+-------------+---------+
| PersonId    | int     |
| FirstName   | varchar |
| LastName    | varchar |
+-------------+---------+

PersonId 是上表主鍵
表2: Address

+-------------+---------+
| 列名         | 類型    |
+-------------+---------+
| AddressId   | int     |
| PersonId    | int     |
| City        | varchar |
| State       | varchar |
+-------------+---------+

AddressId 是上表主鍵

編寫一個 SQL 查詢，滿足條件：無論 person 是否有地址信息，都需要基於上述兩表提供 person 的以下信息：

FirstName, LastName, City, State

/* Write your T-SQL query statement below */


select FirstName, LastName, 
(select City from Address where Address.PersonId = Person.PersonId ) as City,
(select State from Address where Address.PersonId = Person.PersonId ) as State 
from Person