【LeetCode】175.组合两个表

175.组合两个表sql

用到的表和数据SQL：spa

Create table Person (PersonId int,FirstName varchar(255), LastName varchar(255));
Create table Address (AddressId int,PersonId int, City varchar(255), State varchar(255));
Truncate table Person;
insert into Person (PersonId, LastName,FirstName) values ('1', 'Wang', 'Allen');
Truncate table Address;
insert into Address (AddressId, PersonId,City, State) values ('1', '2', 'New York City', 'New York');

答案：3d

此题至关因而把两个表的数据经过PersonId链接在一块儿，组合成一张新表code

select p.FirstName,p.LastName,a.City,a.State from Person p
left join Address a on a.PersonId =p.PersonId

写的比较粗糙，有不理解的能够扫描二维码加QQ群找我解答。blog