Question

Here is my table CusOrder that collect customer order

OrderID       Cus_ID    Product_ID  NumberOrder      OrderDate
   1        0000000001      9          1        6/5/2553 0:00:00
   2        0000000001     10          1        6/5/2553 0:00:00
   3        0000000004      9          2        13/4/2553 0:00:00
   4        0000000004      9           1        17/3/2553 0:00:00
   5        0000000002      9           1        22/1/2553 0:00:00
   7        0000000005      9           1        16/12/2552 0:00:00
   8        0000000003      9           3        13/12/2552 0:00:00
  10        0000000001      9           2        19/11/2552 0:00:00
  11        0000000003      9           2        10/11/2552 0:00:00
  12        0000000002      9           1        23/11/2552 0:00:00

I need to select 3 lastest order for each customer and I need all customer
so it will show each customer and his/her 3 lastest order
how can I do it

sorry for my bad english

Answer 1

WITH Temp AS
(
    SELECT *, (ROW_NUMBER() OVER (PARTITION BY Cus_ID ORDER BY OrderDate DESC)) AS Number
    FROM CusOrder
)
SELECT * FROM Temp WHERE Number <= 3

Should work. Not tested with this exact database structure, but something similar.