The following SQL Server example demonstrates including two Common Table Expressions (CTEs) in a single statement. The CTEs cannot be nested (no recursion).

WITH
 CountDate (TotalCount, TableName) AS
    (
     SELECT COUNT(datekey), 'DimDate' FROM DimDate
    ) ,
 CountCustomer (TotalAvg, TableName) AS
    (
     SELECT COUNT(CustomerKey), 'DimCustomer' FROM DimCustomer
    )
SELECT TableName, TotalCount FROM CountDate
UNION ALL
SELECT TableName, TotalAvg FROM CountCustomer;