175. Combine Two Table
Leetcode 問題: 175. Combine Two Table
Categories:
題目
有 Person
及 Address
資料表,Person
不一定會有 Address
在不管有沒有 Address
的條件撈取出 FirstName
,LastName
, City
, State
欄位資料
Person 資料表
Column Name | Type |
---|---|
PersonId | int |
FirstName | varchar |
LastName | varchar |
Address 資料表
Column Name | Type |
---|---|
AddressId | int |
PersonId | int |
City | varchar |
State | varchar |
答案
# Write your MySQL query statement below
SELECT `FirstName`, `LastName`, `City`, `State`
FROM `Person`
LEFT JOIN `Address` ON
`Person`.`PersonId` = `Address`.`PersonId`