Sql query for special record - sql

Question

At the first excuse me for my bad english.
I have two tables:
master table:
| product id | pr_name | remain_Qty |
+--------------+------------------+-------------------+
| 1 | x | 13 |
| 2 | y | 18 |
| 3 | z | 21 |
+--------------+------------------+-------------------+
Detail Table (This table contain detail data of bought product):
+--------------+------------------+----------+--------+
| date | pr_id | Qty |price |
+--------------+------------------+----------+--------+
| 2010-01-01 | 1 | 3 | 1000 |
| 2010-01-02 | 1 | 5 | 1200 |
| 2010-01-01 | 2 | 11 | 1100 |
| 2010-01-03 | 1 | 4 | 1400 |
| 2010-01-04 | 3 | 3 | 1300 |
| 2010-01-01 | 2 | 6 | 1600 |
| 2010-01-03 | 1 | 7 | 1700 |
| 2010-01-02 | 3 | 3 | 1300 |
| 2010-01-01 | 3 | 5 | 1500 |
| 2010-01-04 | 3 | 7 | 1700 |
| 2010-01-06 | 2 | 8 | 1800 |
| 2010-01-07 | 2 | 4 | 1400 |
| 2010-01-03 | 1 | 3 | 1300 |
| 2010-01-04 | 3 | 6 | 1600 |
| 2010-01-08 | 1 | 1 | 1100 |
+--------------+------------------+----------+--------+
sum Qty of product 1 = 23
sum Qty of product 2 = 29
sum Qty of product 3 = 21
As a result I want list of the Details table, where the list is sorted by pr_id , date and price, but the sum(Qty) per pr_id don't exceed the remain_Qty of the product_id of the Master table.
For example:
+--------------+------------------+----------+--------+
| date | pr_id | Qty |price |
+--------------+------------------+----------+--------+
| 2010-01-01 | 1 | 3 | 1000 |
| 2010-01-02 | 1 | 5 | 1200 |
| 2010-01-03 | 1 | 4 | 1400 |
| 2010-01-03 | 1 | 1 | 1700 |
| 2010-01-01 | 2 | 11 | 1100 |
| 2010-01-01 | 2 | 6 | 1600 |
| 2010-01-01 | 3 | 5 | 1500 |
| 2010-01-02 | 3 | 3 | 1300 |
| 2010-01-04 | 3 | 3 | 1300 |
| 2010-01-04 | 3 | 7 | 1700 |
+--------------+------------------+----------+--------+

Answer 1

More of a clarification than a direct SQL answer. But what it LOOKS like they may be wanting is based on an inventory being depleted to fill orders from the known available quantity, but even that falls short as the may be missing a second qty of 3 on 2010-01-03 for product 1... which if looking at just ID=1 from his sample data would show...
| date | pr_id | Qty |price | Qty Available to fill order
+--------------+--------+-----+-------+
| 2010-01-01 | 1 | 3 | 1000 | 13 - 3 = 10 avail next order
| 2010-01-02 | 1 | 5 | 1200 | 10 - 5 = 5 avail next order
| 2010-01-03 | 1 | 3 | 1300 | 5 - 3 = 2 avail next order
| 2010-01-03 | 1 | 4 | 1400 | only 2 to PARTIALLY fill this order
| 2010-01-03 | 1 | 7 | 1700 | none available
| 2010-01-08 | 1 | 1 | 1100 | none available
With the extra sample record removed, would result in...
| date | pr_id | Qty |price | Qty Available to fill order
+--------------+--------+-----+-------+
| 2010-01-01 | 1 | 3 | 1000 | 13 - 3 = 10 avail next order
| 2010-01-02 | 1 | 5 | 1200 | 10 - 5 = 5 avail next order
| 2010-01-03 | 1 | 4 | 1400 | 5 - 4 = 1 avail for next order
| 2010-01-03 | 1 | 7 | 1700 | only 1 of the 7 available
| 2010-01-08 | 1 | 1 | 1100 | no more available...
So Aliasghar, does this better represent what you are trying to do??? Fill the available orders based on which order was entered into the system first, fill as many as possible based on inventory and stop there?
Please confirm by adding comment to this answer and maybe we can help resolve... Also, confirm WHICH Database are you using... SQL-Server, Oracle, MySQL, etc...

Answer 2

Here a working query for pr_id=1 , I used MySql:
select final.pr_date, final.pr_id, count(t_qty) as qty, final.price from
(select * FROM (select q.pr_date, q.pr_id, 1 as t_qty, q.price , #t := #t + t_qty total
FROM(
SELECT d.pr_date, d.pr_id, 1 as t_qty, d.price
FROM detail_table d
JOIN generator_4k i
ON i.n between 1 and d.qty
WHERE d.pr_id= 1
Order by d.id, d.pr_date) q
CROSS JOIN (SELECT #t := 0) i) c
WHERE c.total <= (select remain_qty from master_table WHERE product_id = 1)) final
group by final.pr_date , final.pr_id , final.price ;
Here SQL FIDDLE
You have to adapt your detail_table to add a technical id as primary key and create some views, I renamed the date column as pr_date, You'll find the schema on the sql fiddle.
Here another query Using SQL SERVER
select final.pr_date, final.pr_id, count(t_qty) as qty, final.price from
(SELECT top(select remain_qty from master_table WHERE product_id = 1) d.pr_date, d.pr_id, 1 as t_qty, d.price
FROM detail_table d
JOIN generator_4k i
ON i.n between 1 and d.qty
WHERE d.pr_id= 1
Order by d.id, d.pr_date) final
group by final.pr_date , final.pr_id , final.price ;
Here SQL FIDDLE

Answer 3

Daywise product by info
Beneath a suggested statement.
select t2.date,t2.pr_id,t1.pr_name,sum(qty) as qty_buy,sum(price) as amount from master_table as t1
inner join detail_table as t2 on t1.product_id=t2.pr_id
group by t2.date,t2.pr_id
order by t1.date,t2.pr_id

Answer 4

I had a hard time to understand what you really wanted.
So if I understood well, you want some data that correspond to a product but do not go over your remained item.
So I coudn't bypass yet the first query that goes over, and only take the remaining from it.
So my query for now just stop until it s get to the remained items allowed
SQL FIDDLE
To be able to do what you want, you need to first create a view that generate row based on your quantity.
Like something like
> +--------------+------------------+----------+--------+
| date | pr_id | Qty |price |
+--------------+------------------+----------+--------+
| 2010-01-01 | 1 | 3 | 1000 |
turn into something like
> +--------------+------------------+----------+--------+
| date | pr_id | Qty |price |
+--------------+------------------+----------+--------+
| 2010-01-01 | 1 | 1 | 1000
| 2010-01-01 | 1 | 1 | 1000 |
| 2010-01-01 | 1 | 1 | 1000 |
Then you count your rows until your remained item allows you to do it.
After you regroup all of the row by price,pr_id and date.
VOILA