SQL WITH Common Table Expression Statement

	WITH
	Table01
	(
		Col01,
		Col02,
		Col03,
		Col04
	)
	AS
	(
		SELECT	
			dtCreationDateTime,
			vcFileName,
			Desc,
			1
		FROM 
			tbTable02 A WITH (NOLOCK)
	)
	SELECT * FROM Table01;

-- Define the CTE expression name and column list.  
WITH Sales_CTE (SalesPersonID, SalesOrderID, SalesYear)  
AS  
-- Define the CTE query.  
(  
    SELECT SalesPersonID, SalesOrderID, YEAR(OrderDate) AS SalesYear  
    FROM Sales.SalesOrderHeader  
    WHERE SalesPersonID IS NOT NULL  
)  
-- Define the outer query referencing the CTE name.  
SELECT SalesPersonID, COUNT(SalesOrderID) AS TotalSales, SalesYear  
FROM Sales_CTE  
GROUP BY SalesYear, SalesPersonID  
ORDER BY SalesPersonID, SalesYear; 

WITH Sales_CTE (SalesPersonID, TotalSales, SalesYear)  
AS  
-- Define the first CTE query.  
(  
    SELECT SalesPersonID, SUM(TotalDue) AS TotalSales, YEAR(OrderDate) AS SalesYear  
    FROM Sales.SalesOrderHeader  
    WHERE SalesPersonID IS NOT NULL  
       GROUP BY SalesPersonID, YEAR(OrderDate)  
  
)  
,   -- Use a comma to separate multiple CTE definitions.  
  
-- Define the second CTE query, which returns sales quota data by year for each sales person.  
Sales_Quota_CTE (BusinessEntityID, SalesQuota, SalesQuotaYear)  
AS  
(  
       SELECT BusinessEntityID, SUM(SalesQuota)AS SalesQuota, YEAR(QuotaDate) AS SalesQuotaYear  
       FROM Sales.SalesPersonQuotaHistory  
       GROUP BY BusinessEntityID, YEAR(QuotaDate)  
)  
  
-- Define the outer query by referencing columns from both CTEs.  
SELECT SalesPersonID  
  , SalesYear  
  , FORMAT(TotalSales,'C','en-us') AS TotalSales  
  , SalesQuotaYear  
  , FORMAT (SalesQuota,'C','en-us') AS SalesQuota  
  , FORMAT (TotalSales -SalesQuota, 'C','en-us') AS Amt_Above_or_Below_Quota  
FROM Sales_CTE  
JOIN Sales_Quota_CTE ON Sales_Quota_CTE.BusinessEntityID = Sales_CTE.SalesPersonID  
                    AND Sales_CTE.SalesYear = Sales_Quota_CTE.SalesQuotaYear  
ORDER BY SalesPersonID, SalesYear;    

Sources:

https://docs.microsoft.com/en-us/sql/t-sql/queries/with-common-table-expression-transact-sql?view=sql-server-ver15