Question

i have 2 tables

customer

customerid    
customername

orders

customerid
orderid
isopen [true/false]

How can i create a view that will contain the following :

customer name , total orders , total orders where isopen column ==true

*Update**

create view CustomerOrders as
select c.id CustomerID, 
       max(c.customername) CustomerName,
       count(o.order_id) CustomerOrders,
       SUM(CASE WHEN o.isopen = 1 THEN 1 ELSE 0 END) AS OpenOrders
from customer c
left join orders o on c.id = o.customerid
group by c.id

Thank you all
mark please correct your answer so i can mark you

Answer 1

Try:

create view CustomerOrders as
select c.customerid CustomerID, 
       max(c.customername) CustomerName,
       count(o.order_id) CustomerOrders,
       SUM(CASE WHEN o.isopen = 1 THEN 1 ELSE 0 END) OpenOrders
from customer c
left join orders o on c.customerid = o.customerid
group by c.id

(Assumes that you want to include customers with no orders – change the left join to an inner join if you want to include only customers with orders.)