SQL QUERY double full join and a nested join - mysql

Question

I have been struggling to make a single sql query that would give the result of all 3 queries in one. I suppose I would need to use full joins.
These 3 queries are all grouped by hour_key and store_id and ordered by hour_key.
The 3 queries are the following :
select SUM(qty_invoiced) as diag, DATE_FORMAT(a.created_at, '%Y-%m-%d-%h') as hour_key, b.store_id
from sales_flat_order_item a inner join
sales_flat_order b
on (a.order_id = b.entity_id)
where a.created_at BETWEEN (NOW() - INTERVAL 7 DAY) AND NOW() AND
a.parent_item_id IS NULL AND
a.sku LIKE 'D-%' AND b.status in ('processing', 'complete', 'printed', 'ready_to_print', 'ready_to_ship')
GROUP BY DATE_FORMAT(a.created_at, '%Y-%m-%d-%h'), b.store_id
ORDER BY hour_key DESC
select SUM(grand_total) as grand_total, store_id , DATE_FORMAT(created_at, '%Y-%m-%d-%h') as hour_key, SUM(shipping_amount) as shipping
from sales_flat_order
where created_at BETWEEN (NOW() - INTERVAL 7 DAY) AND NOW() AND status in ('processing', 'complete', 'printed', 'ready_to_print', 'ready_to_ship')
GROUP BY DATE_FORMAT(created_at, '%Y-%m-%d-%h'), store_id
ORDER BY hour_key DESC
SELECT COUNT(a.entity_id) as totalPaniers, a.store_id, DATE_FORMAT(a.created_at, '%Y-%m-%d-%h') as hour_key
FROM sales_flat_quote a
WHERE a.created_at BETWEEN (NOW() - INTERVAL 7 DAY) AND NOW()
GROUP BY DATE_FORMAT(a.created_at, '%Y-%m-%d-%h'), a.store_id
ORDER BY hour_key DESC

Answer 1

We don't know what your table structure is, so my best guess is
SELECT
DATE_FORMAT(a.created_at, '%Y-%m-%d-%h') as hour_key,
COUNT(entity_id) as totalPaniers,
store_id,
SUM(grand_total) as grand_total,
SUM(shipping_amount) as shipping,
SUM(qty_invoiced) as diag
FROM
sales_flat_quote a
[LEFT] JOIN sales_flat_order b ON a.store_id=b.store_id
INNER JOIN sales_flat_order_item c ON c.order_id=b.entity_id
WHERE
a.created_at BETWEEN (NOW() - INTERVAL 7 DAY) AND NOW()
AND b.created_at BETWEEN (NOW() - INTERVAL 7 DAY) AND NOW()
AND c.created_at BETWEEN (NOW() - INTERVAL 7 DAY) AND NOW()
AND b.`status` IN ('processing', 'complete', 'printed', 'ready_to_print', 'ready_to_ship')
AND c.parent_item_id IS NULL
AND c.sku LIKE 'D-%'
GROUP BY
b.created_at, store_id
ORDER BY hour_key DESC