我正在使用 pgadminIII (postgreSQL)
我有下表: 书, 出版社, 订单行, 购物订单。
使用以下 SQL:
SELECT
Book.BookID AS "Book ID"
,Book.Title AS "Book title"
,SUM(OrderLine.quantity) AS "Number Ordered"
,ShopOrder.OrderDate AS "Order Date"
FROM (((Book
INNER JOIN OrderLine
ON Book.BookID = OrderLine.BookID)
INNER JOIN Publisher
ON Book.PublisherID = Publisher.PublisherID )
INNER JOIN ShopOrder
ON OrderLine.ShopOrderID = ShopOrder.ShopOrderID)
GROUP BY ShopOrder.OrderDate, Name, Book.BookID
.
我想将它与 (WHERE Publisher.Name = "Smith Smitheson"
) 一起使用
我不知道把它放在哪里,或者如果我做对了,有什么帮助吗?
最佳答案
...
INNER JOIN Publisher ON Book.PublisherID = Publisher.PublisherID AND Publisher.Name = 'Smith Smitheson' )
...
或
SELECT Book.BookID AS "Book ID" ,Book.Title AS "Book title"
,SUM(OrderLine.quantity) AS "Number Ordered" ,ShopOrder.OrderDate AS
"Order Date" FROM Book
INNER JOIN OrderLine ON Book.BookID = OrderLine.BookID
INNER JOIN Publisher ON Book.PublisherID = Publisher.PublisherID
INNER JOIN ShopOrder ON OrderLine.ShopOrderID = ShopOrder.ShopOrderID
WHERE Publisher.Name = 'Smith Smitheson'
GROUP BY ShopOrder.OrderDate, Name, Book.BookID
关于postgresql - 内部连接的 SQL where 子句,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/36815513/