SQL 組合兩個表
阿新 • • 發佈:2019-03-16
state 查詢 -- join 地址 ssid ssi ESS write
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
Solution Code
# Write your MySQL query statement below select Person.FirstName, Person.LastName, Address.City, Address.State from Person left outer join Address on Person.PersonId = Address.PersonId;
SQL 組合兩個表