Common Table Expressions - 我們在哪裏創建一個？查看，存儲過程等？

Question

我對CTE很新穎 - 當我們定義一個公用表表達式時，我們是否將它創建爲存儲過程，視圖等？例如，如果我有：

USE AdventureWorks2012; 
GO 
WITH DirectReports(ManagerID, EmployeeID, Title, EmployeeLevel) AS 
(
    SELECT ManagerID, EmployeeID, Title, 0 AS EmployeeLevel 
    FROM dbo.MyEmployees 
    WHERE ManagerID IS NULL 
    UNION ALL 
    SELECT e.ManagerID, e.EmployeeID, e.Title, EmployeeLevel + 1 
    FROM dbo.MyEmployees AS e 
     INNER JOIN DirectReports AS d 
     ON e.ManagerID = d.EmployeeID 
) 
SELECT ManagerID, EmployeeID, Title, EmployeeLevel 
FROM DirectReports 
ORDER BY ManagerID; 
GO 

我該在哪裏存放這個？我希望我有道理。這是一個我想要存儲在某個地方以供重用的查詢。

Answer 1

您將使用一個視圖。雖然這是一個分層查詢，但它仍然是這樣的：一個查詢。