Question

鉴于以下两个表：

Person table 
id (pk) 
first 
middle 
last 
age

Address table 
id(pk) 
person_id (fk person.id) 
street 
city 
state 
zip

如何创建一个SQL语句，返回邮政编码为97229的人的所有信息？

Answer 1

Select * from people p, address a where  p.id = a.person_id and a.zip='97229';

或者你必须尝试使用JOIN这是一种更有效，更好的方法，因为Gordon Linoff在下面的评论中也说你需要学习这个。

SELECT p.*, a.street, a.city FROM persons AS p
JOIN address AS a ON p.id = a.person_id
WHERE a.zip = '97299';

此处p.*表示它将显示PERSONS表的所有列。

Answer 2

您需要加入两个表：

select p.id, p.first, p.middle, p.last, p.age,
       a.id as address_id, a.street, a.city, a.state, a.zip
from Person p inner join Address a on p.id = a.person_id
where a.zip = '97229';

这将选择两个表中的所有列。您当然可以通过在select子句中选择不同的列来限制它。

Answer 3

就像那样：

SELECT p.*, a.street, a.city FROM persons AS p
JOIN address AS a ON p.id = a.person_id
WHERE a.zip = '97299'

Answer 4

首先从人员表中选择所有记录，然后将所有这些记录加入另一个表'地址'...现在你已经记录了所有在地址表中有地址的人...所以最后用邮编过滤你的记录

 select * from Person as P inner join Address as A on 
    P.id = A.person_id Where A.zip='97229'

Answer 5

select P.*,
A.Street,
A.City,
A.State
from Preson P
inner join Address A on P.id=A.Person_id
where A.Zip=97229
Order by A.Street,A.City,A.State

具有多个表的SQL select语句

5 个答案: