LINQ query to select top five

Question

I have a LINQ query:

var list = from t in ctn.Items
           where t.DeliverySelection == true && t.Delivery.SentForDelivery == null
           ord         


        

Answer 1

Just thinking you might be feel unfamiliar of the sequence From->Where->Select, as in sql script, it is like Select->From->Where.

But you may not know that inside Sql Engine, it is also parse in the sequence of 'From->Where->Select', To validate it, you can try a simple script

select id as i from table where i=3

and it will not work, the reason is engine will parse Where before Select, so it won't know alias i in the where. To make this work, you can try

select * from (select id as i from table) as t where i = 3