需要使用SQL帮助加入一个功能

Question

我想请输入以下命令QuoteItem的UPDATE触发器：

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

答复发现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) 

尝试改变我上面所做的，分配一个表别名xx和引用，而不是..