連接具有相同主鍵的表

Question

如何聯接具有相同主鍵的三個表並進行一個視圖？ 任何線索將不勝感激。

我有3個表sttm_customer ， sttm_customer_c和sttm_customer_custom ，它們具有與所有共同的customer_no。

我需要使STVW_CUSTOMER_TEMP合並所有視圖。

Answer 1

如果我了解您要執行的操作，則可以使用UNION：

SELECT customer_no (and any other matching columns)
FROM sttm_customer
UNION 
SELECT customer_no (and any other matching columns)
FROM sttm_customer_c 
UNION customer_no (and any other matching columns)
FROM sttm_customer_custom