Different results from Identical databases - mysql

Question

I'm having an issue where my live database (MariaDB) has the exact same data as my local(MySQL) but the following query is returning the same results but in a different order (I know im not the best at SQL so I'll apologise in advance):
SELECT
`products`.*
, CONCAT( `booking_inventory`.`year`, '-', LPAD( `booking_inventory`.`month`, 2, '00' ), '-', LPAD( `booking_inventory`.`day`, 2, '00' ) ) AS `order_date`
, `category_product`.`category_id` AS `pivot_category_id`
, `category_product`.`product_id` AS `pivot_product_id`
, `count_activate`.`active_count`
, IF( `count_activate`.`product_id` > 0, 0, 1 ) AS coming_soon
FROM
`products`
INNER JOIN
`category_product`
ON
`products`.`id` = `category_product`.`product_id`
LEFT JOIN
(
SELECT
inventory.*
FROM
inventory
INNER JOIN
`booking_inventory`
ON
`inventory`.`id` = `booking_inventory`.`inventory_id`
WHERE
CONCAT( `booking_inventory`.`year`, '-', LPAD( `booking_inventory`.`month`, 2, '00' ), '-', LPAD( `booking_inventory`.`day`, 2, '00' ) ) > NOW()
ORDER BY
DATE( CONCAT( `booking_inventory`.`year`, '-', LPAD( `booking_inventory`.`month`, 2, '00' ), '-', LPAD( `booking_inventory`.`day`, 2, '00' ) ) )
)
AS
inventory
ON
`products`.`id` = `inventory`.`product_id`
INNER JOIN
`booking_inventory`
ON
`inventory`.`id` = `booking_inventory`.`inventory_id`
LEFT JOIN
(
SELECT
COUNT(inventory.id) AS active_count
, product_id
FROM
inventory
INNER JOIN
`booking_inventory`
ON
`inventory`.`id` = `booking_inventory`.`inventory_id`
WHERE
status_id = 1
AND
(
stock > 0
OR stock = -1
)
AND
CONCAT( `booking_inventory`.`year`, '-', LPAD( `booking_inventory`.`month`, 2, '00' ), '-', LPAD( `booking_inventory`.`day`, 2, '00' ) ) > NOW()
GROUP BY
product_id
)
AS
count_activate
ON
`count_activate`.`product_id` = `products`.`id`
WHERE
`category_product`.`category_id` = 2
AND EXISTS
(
SELECT
*
FROM
`sites`
INNER JOIN
`product_site`
ON
`sites`.`id` = `product_site`.`site_id`
WHERE
`product_site`.`product_id` = `products`.`id`
AND
`status_id` = 1
AND
`site_id` = 1
)
AND
`products`.`status_id` = 1
AND
CONCAT( `booking_inventory`.`year`, '-', LPAD( `booking_inventory`.`month`, 2, '00' ), '-', LPAD( `booking_inventory`.`day`, 2, '00' ) ) > NOW()
GROUP BY
`products`.`id`
ORDER BY
`coming_soon` ASC
, `order_date` ASC
LIMIT 100
OFFSET 0
can anyone tell me whats causing this?
regards
(left id External right is Local)
EDIT
Thanks for the daft comments below and the down vote, very helpful.... After some digging, I have found the cause yet not the answer. In the second JOIN (inventory) the date ordering isn't returning the same results. If I order by the inventory id, price, SKU I get the same results across local and external data but not using the date... would anyone know why?
regards

Answer 1

The problem was down to the version/dbengine. The first left join has an order by in it, which I didn't realise didn't keep its order once used by the parent (depending on version/dbengine).
One way to overcome this is by setting a limit of 18446744073709551615 which forces the results to be stored in a temp table (or something, i know not what I speak!).
the other issue was inner join further down the query which forced to table to be reordered.
SELECT
IF( `counter`.`product_id` > 0, 0, 1 ) AS coming_soon,
bd.skill_level,
counter.active_count,
p.*
FROM
(
SELECT
p.*,
booking_inventory.inventory_id,
category_product.category_id,
CONCAT( `booking_inventory`.`year`, '-', LPAD( `booking_inventory`.`month`, 2, '00' ), '-', LPAD( `booking_inventory`.`day`, 2, '00' ) ) as date
FROM
booking_inventory
JOIN
inventory
ON
inventory.id = booking_inventory.inventory_id
LEFT JOIN
products AS p
ON
p.id = inventory.product_id
INNER JOIN
`category_product`
ON
`p`.`id` = `category_product`.`product_id`
WHERE
CONCAT( `booking_inventory`.`year`, '-', LPAD( `booking_inventory`.`month`, 2, '00' ), '-', LPAD( `booking_inventory`.`day`, 2, '00' ) ) > NOW()
AND
`category_product`.`category_id` = 2
ORDER BY
date
LIMIT
18446744073709551615
)
AS
p
LEFT JOIN
booking_data AS bd
ON
p.id = bd.product_id
LEFT JOIN
(
SELECT
COUNT(`inventory`.`id`) AS `active_count`,
`inventory`.`product_id`
FROM
`inventory`
INNER JOIN
`booking_inventory`
ON
`inventory`.`id` = `booking_inventory`.`inventory_id`
WHERE
`inventory`.`status_id` = 1
AND
(
`inventory`.`stock` > 0
OR
`inventory`.`stock` = -1
)
AND
CONCAT( `booking_inventory`.`year`, '-', LPAD( `booking_inventory`.`month`, 2, '00' ), '-', LPAD( `booking_inventory`.`day`, 2, '00' ) ) > NOW()
GROUP BY
`inventory`.`product_id`
)
AS
counter
ON
`counter`.`product_id` = `p`.`id`
WHERE
EXISTS
(
SELECT
*
FROM
`sites`
INNER JOIN
`product_site`
ON
`sites`.`id` = `product_site`.`site_id`
WHERE
`product_site`.`product_id` = `p`.`id`
AND
`status_id` = 1
AND
`site_id` = 1
)
GROUP BY
p.id
ORDER BY
coming_soon,
p.date,
p.name