我正在使用pgadminIII(postgreSQL)
我有以下表格: 书, 出版商, 订单行, ShopOrder。
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
.
我想用(WHERE Publisher.Name = "Smith Smitheson"
)
我不知道该把它放在哪里,或者如果我做得对,请帮忙吗?
答案 0 :(得分:10)
...
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