MySQL select - get count by group - mysql

Question

I have two tables joined and grouped, one is Orders the other one is Items.
What I want to get is the number of orders we have in x period.
So my initial thought was to first get the count of how may times each order occurs in the dataset, then divide each line by the above number, eg, order ID 1 occurs 3 times so the count would be .33 which * 3 = 1 order.
But i am having trouble at the first step, in getting the correct count of order.id occurrences.
What I would expect to show is like this:
+-------+---------+------+
|order |item |count |
|number | | |
+-------+---------+------+
| 1 | ABC | 3 |
+-------+---------+------+
| 1 | DEF | 3 |
+-------+---------+------+
| 1 | GHI | 3 |
+-------+---------+------+
| 2 | ABC | 2 |
+-------+---------+------+
| 2 | DEF | 2 |
+-------+---------+------+
| 3 | ABC | 1 |
+-------+---------+------+
but I am only getting it like this:
+-------+---------+------+
|order |item |count |
|number | | |
+-------+---------+------+
| 1 | ABC | 1 |
+-------+---------+------+
| 1 | DEF | 1 |
+-------+---------+------+
| 1 | GHI | 1 |
+-------+---------+------+
| 2 | ABC | 1 |
+-------+---------+------+
| 2 | DEF | 1 |
+-------+---------+------+
| 3 | ABC | 1 |
+-------+---------+------+
And this is my query:
SELECT
`orders`.`id` as 'order number',
`item`.`item`,
COUNT(`orders`.`id`) as ' count'
FROM `db`.`orders`
LEFT JOIN `item` ON `item`.`order_id` = `order`.`order_id`
GROUP BY `orders`.`id`, `item`.`item`
;
How?

Answer 1

Your query should be-
SELECT
`item`.`item`,
COUNT(`orders`.`id`) as 'count'
FROM `db`.`orders`
JOIN `item` ON `item`.`order_id` = `order`.`order_id`
GROUP BY `item`.`item`;
I don't think you need same item row multiple times as you are trying to get item wise count.
Update: You can get your desired results by this one
SELECT t1.order_id, t2.item, t1.cnt FROM
(
SELECT o.order_id,COUNT(i.items) cnt FROM
item i
JOIN orders o ON o.order_id=i.order_id
group by o.order_id
) t1
JOIN
item t2 ON t1.order_id=t2.order_id;

Answer 2

You should try following,
Select
`order`.`order_id`,
`item`.`item`,
`order`.`count`
from
(
SELECT
`orders`.`id` as order_id,
COUNT(*) as 'count'
FROM `db`.`orders`
group by `orders`.`id`
) as order
JOIN `item` ON `item`.`order_id` = `order`.`order_id`

Answer 3

After help from a friend, I ended up getting exactly what i wanted by using the following:
SELECT
orders.id as 'order number',
items.item,
(SELECT count(*) FROM db.items where items.id = sales.id) as 'order_count'
FROM db.orders
GROUP BY orders.id, items.item
;