Question

Lets say I have a table with the following columns:

• Qty, INTEGER
• SaleDate, DATETIME

I would now like to see this result:

Sold in the last 7 days | Sold in last 14 days
-----------------------------------------------------
10                      | 20

I can use a where clause to use between, however how would I get the qty sold for 7 and 14 days?

Answer 1

Filter in the WHERE clause to get days 0 to -14. Then aggregate on days 0 to -7 separately.

SELECT
   ...,
   SUM(CASE WHEN SaleDate >= DATEADD(day, -7, GETDATE()) THEN 1 ELSE 0 END) AS 7days,
   COUNT(*) AS 14days
FROM
   MyTable
WHERE
   SaleDate >= DATEADD(day, -14, GETDATE())
GROUP BY
   ...