需要SQL连接功能的帮助

Question

我试图在QuoteItem的UPDATE触发器中输入以下内容：

UPDATE QuoteItem
SET List = StyleItem.List, CostFactor = StyleItem.CostFactor, Cost = NULL
FROM dbo.fn_GetQuoteItemListPrice(QuoteItem.ItemId, QuoteItem.RoomId) 
    AS StyleItem
CROSS JOIN (QuoteItem JOIN INSERTED ON 
    QuoteItem.QuoteItemId = INSERTED.QuoteItemId)
WHERE (INSERTED.List IS NULL) AND (INSERTED.ItemId IS NOT NULL)

我收到以下错误：

Msg 4104, Level 16, State 1, Procedure QuoteItem_UPDATE, Line 6
The multi-part identifier "QuoteItem.ItemId" could not be bound.
Msg 4104, Level 16, State 1, Procedure QuoteItem_UPDATE, Line 6
The multi-part identifier "QuoteItem.RoomId" could not be bound.

Answer 1

UPDATE QuoteItem
SET List = StyleItem.List, CostFactor = StyleItem.CostFactor, Cost = NULL
FROM dbo.fn_GetQuoteItemListPrice(xx.ItemId, xx.RoomId) 
    AS StyleItem
CROSS JOIN (QuoteItem JOIN INSERTED ON 
    QuoteItem.QuoteItemId = INSERTED.QuoteItemId)  xx
WHERE (INSERTED.List IS NULL) AND (INSERTED.ItemId IS NOT NULL)

尝试我在上面所做的更改，分配一个表别名xx并引用它。

Answer 2

Naomi Nosonovsky 在这里找到答案：

UPDATE QuoteItem
SET List = StyleItem.List, CostFactor = StyleItem.CostFactor, Cost = NULL
FROM QuoteItem JOIN INSERTED AS INSERTED ON QuoteItem.QuoteItemId =
    INSERTED.QuoteItemId
    CROSS APPLY dbo.fn_GetQuoteItemListPrice(QuoteItem.ItemId, QuoteItem.RoomId)
        AS StyleItem 
WHERE (INSERTED.List IS NULL) AND (INSERTED.ItemId IS NOT NULL)