Keep Users Without Payments

#975

The user report must show how many orders with status = 'paid' each user has. The current version dropped users with no paid orders, but they must remain with 0. Return id and paid_orders, sorted by id.

Buggy query

SELECT u.id, COUNT(o.id) AS paid_orders
FROM users u
LEFT JOIN orders o ON o.user_id = u.id
WHERE o.status = 'paid'
GROUP BY u.id
ORDER BY u.id;

Oodatava väljundi näidis

Nii näeb õige vastus välja — selle ridade arv on omaette ega pea ühtima skeemi tabelitega.

id	paid_orders
1	2
2	1
3	0

Logi sisse, et esitada

Sinu päringu tulemus ilmub siia