SQL CTE code example

Example 1: sql rtrim

SELECT RTRIM('SQL Tutorial     ') AS RightTrimmedString;

Example 2: CTE statement sql server

WITH Employee_CTE (EmployeeNumber, Title)
AS
(SELECT NationalIDNumber,
        JobTitle
 FROM   HumanResources.Employee)
SELECT EmployeeNumber,
       Title
FROM   Employee_CTE

Example 3: SQL SERVER 2016 cte

-- 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;

Example 4: sql conn

Always use Prepared Statements 
Watch out for SQL injections!!!