如何將cte與join查詢結合使用表格

Question

如何將這些表格與cte與join查詢結合起來？

WITH CTE AS(
    SELECT *, 
     Rn = ROW_NUMBER() OVER(PARTITION BY productCode ORDER BY productId) 
    FROM sellingprice 
) 
sELECT 
    *, 
    productcode = CASE 
       WHEN Rn = 0 THEN productCode 
       ELSE productCode+ CHAR(65 + Rn -1) 
      END 
from CTE 

Answer 1

如果你正在尋找這兩個查詢，CTE和其他查詢相結合。那麼你可以做到這一點：

WITH CTE 
AS 
(
    SELECT *, 
     Rn = ROW_NUMBER() OVER(PARTITION BY productCode ORDER BY productId) 
    FROM sellingprice 
), CTE2 
AS 
(-- you can put here the second query you need to combine with the first cte 
    SELECT 
     sp.productid, sp.productname, ... 
    from sellingPrice sp 
    inner join cost ... 
) 
-- here the two queries are accessible from cte, cte2 
SELECT *, 
    productcode = CASE 
       WHEN Rn = 0 THEN productCode 
       ELSE productCode+ CHAR(65 + Rn -1) 
       END, .... -- you can select other columns 
from CTE c1 
INNER JOIN CTE2 c2 ON c1.productid = c2.productid