需要使用SQL幫助加入一個功能

Question

我想請輸入以下命令QuoteItem的UPDATE觸發器：

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) 

我得到follwoing錯誤：

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

答覆發現here由Naom我Nosonovsky：

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) 

Answer 2

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) 

嘗試改變我上面所做的，分配一個表別名xx和引用，而不是..