How can I reuse a Common Table Expression

Question

I am using a Common Table Expression for paging:

with query as (
  Select Row_Number() over (Order By OrderNum ASC) as TableRowNum,
         FirstName,
              


        

Answer 1

According to Microsoft in this link:

A CTE can reference itself and previously defined CTEs in the same WITH clause.

In that new CTE referencing the previous defined CTE, we can make the count query:

;with query as (
  Select Row_Number() over (Order By UserID ASC) as TableRowNum,
         FirstName,
         LastName
  From   Users
),
totalCount AS (
    SELECT COUNT(1) Total FROM query
)
Select  query.*,
        Total
from    query, totalCount 
where   TableRowNum 
between 1 and 25 
Order By TableRowNum ASC

'query' is the main CTE and 'totalCount' is using it for get the total rows count

Microsoft should have an example for a common task like this.