Mysql - 組合2個SQL查詢

Question

我有2個查詢返回2個結果集。 如何組合這兩個查詢來獲得單個結果？

首先查詢：

SELECT * 
FROM Base base 
INNER JOIN Child child ON child.base_id = base.id 
where base.`status` = "active" and base.application = "template"; 

第二個查詢：

SELECT * 
FROM Base base 
WHERE base.`status` = "active" and base.application = "template" and base.role = "public" ; 

請幫助。

Answer 1

你可以嘗試使用UNION：

SELECT col1, col2, col3, col4.... 
FROM Base base 
INNER JOIN Child child ON child.base_id = base.id 
where base.`status` = "active" and base.application = "template" 

UNION 

SELECT col1, col2, col3, col4.... 
FROM Base base 
WHERE base.`status` = "active" and base.application = "template" and base.role = "public" ; 

請注意，如果你想有來自兩個查詢重複的元素，那麼你可以使用UNION ALL。

另外請確保在使用UNION時查詢結果的列數應該相同。

Answer 2

試試這個：

SELECT * 
FROM Base base 
INNER JOIN Child child ON child.base_id = base.id 
WHERE (base.`status` = "active" 
AND base.application = "template")or (base.`status` = "active" and base.application = "template" and base.role = "public");