How to query data over multiple tables in Sql [closed]

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I'm trying to get an extract of data using two tables in Sql. I have an AddressBook table and a companies table. The AddressBook table has a foreign key called companyid which is the primary key in the companies table. The companies table has a column called accountno. How do I lookup all the addresses on the AddressBook table and find the accountno in the companies table using the companyId?

Please let me know if you need any more info

Answer 1

Use the JOIN, i think you want left join. With left join you fetch the companies even if they dont have an adress, but i see you have an inner join tag so i will include that.

left join:

SELECT * FROM companies LEFT JOIN adressbook ON adressbook.companyid = companies.id

inner join:

SELECT * FROM companies INNER JOIN adressbook ON adressbook.companyid = companies.id

Answer 2

select * 
from companies
inner join adressbook on adressbook.companyid = companies.id

if i read it correctly this is what you are looking for