Using SUM in an SQL query

Question

I\'m trying to do a query where it adds up the totals for the orders from each customer.

I have tried a few different ways but I am not sure the right way to do it.<

Answer 1

Sum and count can be used to get the result you want:

select CustomerID, count(*) as Orders, ShipName, sum(Total) as Total
from Table
group by CustomerID, ShipName
order by count(*) desc;

Answer 2

select CustomerID, count(OrderID) Orders, ShipName, sum(Total) Total
from Order_TAB
group by CustomerID, ShipName