175. Combine Two Tables

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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

# Write your MySQL query statement below
SELECT Person.FirstName, Person.LastName, Address.City, Address.State
FROM Person
LEFT JOIN Address
ON Person.PersonId = Address.PersonId;

很明确了，left join

175. Combine Two Tables

标签：col   prim   fir   bin   bsp   from   mat   mysql   rdl   

原文地址：https://www.cnblogs.com/wentiliangkaihua/p/11904972.html