mySQL: Joining three tables - how?
I have the following query in my application. It works well, but I need it to also contain the number of products that are associated with each manufacturer.
The current query:
SELECT * FROM (`manufacturers`)
JOIN `languages` ON `m开发者_高级运维anufacturers`.`lang` = `languages`.`id`
ORDER BY `languages`.`id` asc, `id` asc
My products table looks like this:
id | name | manufacturerid
0 | Product1 | 0
SELECT `manufacturers`.*, `languages`.*, COUNT(`products`.`id`) AS NumberOfProducts
FROM (`manufacturers`)
JOIN `languages` ON `manufacturers`.`lang` = `languages`.`id`
LEFT OUTER JOIN `products` ON
`products`.`manufacturerid` = `manufacturers`.`manufacturerid`
GROUP BY <Column list for manufacturers AND languages here>
ORDER BY `languages`.`id` asc, `manufacturers`.`id` asc
select *
from `manufacturers` m
inner join `languages` l on m.`lang` = l.`id`
left outer join (
select manufacturerid, count(*) as ProductCount
from Products
group by manufacturerid
) pc on m.id = pc.manufacturerid
order by l.`id` asc, m.`id` asc
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