如何加入两个表中的多个列sql

代码示例

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加入多个表在sql

SELECT Books_Namn, Author_Namn, Author_Age, Store_Namn FROM books

JOIN Author ON Author_Id = Author_Author_Id

JOIN Books_has_Store ON Books_Books_Id = Books_Id

JOIN Store ON Store_Id = Store_Store_Id;
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加入多个表

SELECT o.orderid, o.amount, i.description
2FROM orders o
3INNER JOIN items i
4ON o.itemid = i.itemid

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