SQL Aggregate Function Min with Group - mysql

Question

I have a table named Prices. Which contain ID, fkProductID (foregnkey of Products Table), PriceDate, Price, fkStore (the supplier ID who gives the prices)
Now I need to find the best price for each product for each month and the SUPPLIER name also.
Also some suppliers are giving duplicates prices. For example product id 8 got two times 1200 (ID# 8 and 3). If possible i only need to show the first supplier or a column with count values..
ID fkProductID PriceDate Price fkStore
-----------------------------------------------------
1 8 26-10-2014 1250 13
2 8 10-09-2014 1200 13
3 8 25-10-2014 1200 1
4 8 13-10-2014 1500 1
5 8 03-09-2014 1000 1
6 8 15-09-2014 1300 15
7 8 09-09-2014 950 21
8 8 10-10-2014 1200 23
9 8 09-09-2014 950 27
10 15 10-10-2014 3500 5
11 15 11-10-2014 3400 6
12 15 09-09-2014 3100 6
13 15 10-09-2014 3200 14
14 15 16-09-2014 3100 17
-----------------------------------------------------
my expected result.
-----------------------------------------------------
ID fkProductID Month Price Supplier
-----------------------------------------------------
7 8 September 950 21
2 8 October 1200 1
13 15 September 3100 13
11 15 October 3400 6
=================================================================
SCHEMA
SQL FIDDLE

Answer 1

You can do what you want with the substring_index()/group_concat() trick:
select substring_index(group_concat(idPrices order by Price, idPrices), ',', 1) as id,
fkProductId, monthname(PriceDate) as mon,
min(Price) as price,
substring_index(group_concat(fkStore order by Price, idPrices), ',', 1) as spec_id
from prices p
group by fkProductId, monthname(PriceDate);