I need empty fields in multitable query - mysql

Question

This should be easy for you, but I'm lost here:
I have a database with 4 tables: orders, clients, products, orders_products
I need to fetch all clients, with all of their orders, including the ones that don't have any order.
I'm only getting the ones that have made an order. Poor old "Nick" in the Clients table won't show up.
What am I doing wrong here?
SELECT c.name clientname, o.id orderID, GROUP_CONCAT(p.name) productNAMEs,
GROUP_CONCAT(p.id) productIDs
FROM clients c, orders o, orders_products op, products p
WHERE c.id = o.client_id
AND c.status = 1
AND o.id = op.order_id
AND p.id = op.product_id
GROUP BY c.name
See table definitions here:
https://www.db-fiddle.com/f/bTRSLfYTa19S2EpE2zKwUv/7
Update
#scaisedge came up with an answer that includes clients without orders:
SELECT c.name clientname, o.id orderID, GROUP_CONCAT(p.name) productNAMEs,
GROUP_CONCAT(p.id) productIDs
FROM clients c
LEFT JOIN orders o ON c.id = o.client_id
LEFT JOIN orders_products op ON o.id = op.order_id
LEFT JOIN products p ON p.id = op.product_id
WHERE c.status = 1
GROUP BY c.name
You can see the results here: https://www.db-fiddle.com/f/8bGcQJSbSFmKMUo1tLuZuA/1
It seems that not using JOINs was my problem.

Answer 1

Use explicit join sintax and left join for retrive also row that don't match
SELECT c.name clientname, o.id orderID, GROUP_CONCAT(p.name) productNAMEs,
GROUP_CONCAT(p.id) productIDs
FROM clients c
LEFT JOIN orders o ON c.id = o.client_id
LEFT JOIN orders_products op ON o.id = op.order_id
LEFT JOIN products p ON p.id = op.product_id
WHERE c.status = 1
GROUP BY c.name

Answer 2

I recommand you to use JOIN's to UNIFY the tables data. A JOIN clause is used to combine rows from two or more tables, based on a related column between them.
https://www.w3schools.com/sql/sql_join.asp
SELECT *
FROM clients LEFT JOIN orders ON clients.id = orders.client_id
LEFT JOIN orders_products ON clients.id = orders_products.order_id
LEFT JOIN products ON products.id = orders_products.product_id
WHERE clients.status = 1;

Answer 3

Never use commas in the FROM clause. Always use proper, explicit, standard JOIN syntax.
Also, your GROUP BY needs to match the unaggregated columns in the SELECT.
I'm not sure if you intend this:
SELECT c.name as clientname, o.id as orderID,
GROUP_CONCAT(p.name) as productNAMEs,
GROUP_CONCAT(p.id) productIDs
FROM clients c left join
orders o
on c.id = o.client_id left join
orders_products op
on o.id = op.order_id left join
products p
on p.id = op.product_id
WHERE c.status = 1
GROUP BY c.name, o.id;
Or:
SELECT c.name as clientname,
GROUP_CONCAT(p.name) as productNAMEs,
GROUP_CONCAT(p.id) productIDs
FROM clients c left join
orders o
on c.id = o.client_id left join
orders_products op
on o.id = op.order_id left join
products p
on p.id = op.product_id
WHERE c.status = 1
GROUP BY c.name;