How to separate a record to get the amount

Question

I got total 160 Quantity in the Stock.

How to get first 100 quantity total amount and last 60 quantity total amount?

The table is sort by Date and Stock ID.

Answer 1

Try this:

Result A:

SELECT A.ProductID AS 'Product ID', '100' AS 'Quantity', SUM(A.Amount) as 'Total Amount'
FROM tblStock A
WHERE StockID IN (SELECT B.StockID from tblStock B ORDER BY B.StockID ASC LIMIT 100)

Result B:

SELECT A.ProductID AS 'Product ID', '60' AS 'Quantity', SUM(A.Amount) as 'Total Amount'
FROM tblStock A
WHERE StockID IN (SELECT B.StockID from tblStock B ORDER BY B.StockID DESC LIMIT 60)

Instead of using IN, you can use JOIN.

Result A:

SELECT A.ProductID AS 'Product ID', '100' AS 'Quantity', SUM(A.Amount) AS 'Total Amount'
FROM tblStock AS A
INNER JOIN
 (SELECT StockID from tblStock ORDER BY StockID ASC LIMIT 100) AS B
ON A.StockID = B.StockID

Result B:

SELECT A.ProductID AS 'Product ID', '60' AS 'Quantity', SUM(A.Amount) AS 'Total Amount'
FROM tblStock AS A
INNER JOIN
 (SELECT StockID from tblStock ORDER BY StockID DESC LIMIT 60) AS B
ON A.StockID = B.StockID