连接具有相同主键的表

Question

如何连接三个具有相同主键并且构成一个视图的表？任何线索将不胜感激。

我有3个表sttm_customer,sttm_customer_c和sttm_customer_custom, ，它们都与customer_no有共同点。

我需要做一个视图STVW_CUSTOMER_TEMP合并所有这些。

Answer 1

如果我理解你想要做什么，你可以使用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