Volume of store sql - sql

Question

i want the top 10 stores with the highest volume(percentage) of sales and the 5 with the lowest volume(percentage) of sales in a single report. Here's what i have done until now
SELECT TOP 10 Stores.Store_ID,Suppliers$.NAME,SUM(Store.QTY*Product.PRICE) AS StoreSales
FROM Stores
INNER JOIN Invoices$ ON Stores.store_ID=Invoices.Store_ID
INNER JOIN InvDetails ON Invoices.INVOICE_ID=InvDetails.INVOICE_ID
INNER JOIN Products ON Products.PRODUCT_ID=InvDetails.PRODUCT_ID
GROUP BY Stores.Store_ID,Stores.NAME
ORDER BY StoresSales DESC

Answer 1

select TOP 10 ...
from ...
group by ...
order by StoresSales DESC
union
select TOP 5 ...
from ...
group by ...
order by StoresSales ASC

Answer 2

You can do this with a CTE by dividing the query in two, the first part extracts the highest and the second part the lowest
With c as(
SELECT TOP 10 Stores.Store_ID,Suppliers$.NAME,SUM(Store.QTY*Product.PRICE) AS StoreSales
,cat = 'Max'
FROM Stores
INNER JOIN Invoices$ ON Stores.store_ID=Invoices.Store_ID
INNER JOIN InvDetails ON Invoices.INVOICE_ID=InvDetails.INVOICE_ID
INNER JOIN Products ON Products.PRODUCT_ID=InvDetails.PRODUCT_ID
GROUP BY Stores.Store_ID,Stores.NAME
ORDER BY StoresSales DESC
),
d as (
SELECT TOP 5 Stores.Store_ID,Suppliers$.NAME,SUM(Store.QTY*Product.PRICE) AS StoreSales
,cat = 'Min'
FROM Stores
INNER JOIN Invoices$ ON Stores.store_ID=Invoices.Store_ID
INNER JOIN InvDetails ON Invoices.INVOICE_ID=InvDetails.INVOICE_ID
INNER JOIN Products ON Products.PRODUCT_ID=InvDetails.PRODUCT_ID
GROUP BY Stores.Store_ID,Stores.NAME
ORDER BY StoresSales asc
)
Select *
From c
Union all
Select *
From d

Answer 3

You can use ROW_NUMBER() :
SELECT Stores.Store_ID, Suppliers$.NAME, SUM(Store.QTY*Product.PRICE) AS StoreSales,
ROW_NUMBER() OVER (PARTITION BY Stores.Store_ID, Suppliers$.NAME ORDER BY SUM(Store.QTY*Product.PRICE) DESC) AS MAX_SEQ,
ROW_NUMBER() OVER (PARTITION BY Stores.Store_ID, Suppliers$.NAME ORDER BY SUM(Store.QTY*Product.PRICE)) AS MIN_SEQ
FROM Stores INNER JOIN
Invoices$
ON Stores.store_ID = Invoices.Store_ID INNER JOIN
InvDetails
ON Invoices.INVOICE_ID = InvDetails.INVOICE_ID INNER JOIN
Products
ON Products.PRODUCT_ID = InvDetails.PRODUCT_ID
GROUP BY Stores.Store_ID, Suppliers$.NAME;
By using this, you can filter out :
SELECT t.*
FROM ( <query here>
) t
WHERE (t.MAX_SEQ <= 10 OR MIN_SEQ <= 5);

Answer 4

You could union your query with basically the same query, but change it to top 5 and in ascending order:
SELECT TOP 10 Stores.Store_ID,Suppliers$.NAME,SUM(Store.QTY*Product.PRICE) AS
StoreSales
FROM Stores
INNER JOIN Invoices$ ON Stores.store_ID=Invoices.Store_ID
INNER JOIN InvDetails ON Invoices.INVOICE_ID=InvDetails.INVOICE_ID
INNER JOIN Products ON Products.PRODUCT_ID=InvDetails.PRODUCT_ID
GROUP BY Stores.Store_ID,Stores.NAME
ORDER BY StoresSales DESC
UNION
SELECT TOP 5 Stores.Store_ID,Suppliers$.NAME,SUM(Store.QTY*Product.PRICE) AS
StoreSales
FROM Stores
INNER JOIN Invoices$ ON Stores.store_ID=Invoices.Store_ID
INNER JOIN InvDetails ON Invoices.INVOICE_ID=InvDetails.INVOICE_ID
INNER JOIN Products ON Products.PRODUCT_ID=InvDetails.PRODUCT_ID
GROUP BY Stores.Store_ID,Stores.NAME
ORDER BY StoresSales ASC