特定格式的sql顯示

Question

我試圖以特定格式顯示輸出。 1st, 2nd, 3rd are the product IDs and 4th row is a product itself and is a master id too for 1st, 2nd, 3rd

格式我想在 Master status exists in the status column and does not exist independently in any separate column

我可以使用子查詢來尋找特定的狀態要顯示的數據，但不能用它來顯示值

Answer 1

下面的SQL可以提供期望的輸出

SELECT  P1.PID AS PRODUCT_ID, 
      P1.STATUS AS PRODUCT_STATUS, 
      P2.PID AS MASTER_ID, 
      P2.STATUS AS MASTER_STATUS 
FROM  PRODUCTS AS P1 
INNER JOIN PRODUCTS AS P2 
ON   P1.MASTER = P2.PID 

輸出

PRODUCT_ID PRODUCT_STATUS  MASTER_ID MASTER_STATUS 
---------------------------------------------------------- 
1234  Active    7473  Active 
3457  Active    7473  Active 
3685  Disabled   7473  Active