MSSQL相关子查询

Question

如何将使用游标的代码转换为单个select语句？

ALTER PROC [dbo].[ItemComboWarningItem1]
    @patientApptID int,
    @iwcID int OUTPUT
AS
SET NOCOUNT ON
DECLARE @ItemComboWarningid int;

DECLARE warning_cursor CURSOR FOR   
                SELECT distinct [ItemComboWarningID]
                FROM [dbo].[ItemComboWarning] [icw] 
                INNER JOIN [dbo].[ItemComboWarningItem][icwi] ON [icw].[ID]=[icwi].[ItemComboWarningID] 
                INNER JOIN [dbo].[PatientItem][pi] on [pi].[ItemID]=[icwi].[itemID] 
                INNER JOIN [dbo].[PatientAppointment][pa] ON [pa].[ID]=[pi].PatientAppointmentID  
                WHERE [pa].[id]=@patientApptID 

OPEN warning_cursor  

FETCH NEXT FROM warning_cursor   
INTO @ItemComboWarningid

WHILE @@FETCH_STATUS = 0

  BEGIN

 (SELECT [icwi].[itemid]
  FROM [dbo].[ItemComboWarning] [icw] 
    INNER JOIN [dbo].[ItemComboWarningItem][icwi] ON [icw].[ID]=[icwi].[ItemComboWarningID]  
    INNER JOIN [dbo].[PatientItem][pi] on [pi].[ItemID]=[icwi].[itemID] 
    INNER JOIN [dbo].[PatientAppointment][pa] ON [pa].[ID]=[pi].PatientAppointmentID 
    WHERE  [pa].[id]=@patientApptID
    AND [icwi].[ItemComboWarningid]=@ItemComboWarningid) 
    EXCEPT 
    (SELECT DISTINCT [pi].[itemID] 
     FROM [dbo].[PatientItem][pi]  
     INNER JOIN [dbo].[PatientAppointment][pa] ON [pa].[ID]=[pi].PatientAppointmentID 
     INNER JOIN [dbo].[ItemComboWarningItem][icwi] ON  [pi].[ItemID]=[icwi].[itemID] 
     WHERE  [pa].[id]=@patientApptID) 

  UNION
( SELECT DISTINCT [pi].[itemID] 
  FROM [dbo].[PatientItem][pi]  
        INNER JOIN [dbo].[PatientAppointment][pa] ON [pa].[ID]=[pi].PatientAppointmentID 
        INNER JOIN [dbo].[ItemComboWarningItem][icwi] ON  [pi].[ItemID]=[icwi].[itemID] 
        WHERE  [pa].[id]=@patientApptID) 
        EXCEPT
        (SELECT [icwi].[itemid]
        FROM [dbo].[ItemComboWarning] [icw] 
        INNER JOIN [dbo].[ItemComboWarningItem][icwi] ON [icw].[ID]=[icwi].[ItemComboWarningID]  
        INNER JOIN [dbo].[PatientItem][pi] ON [pi].[ItemID]=[icwi].[itemID] 
        INNER JOIN [dbo].[PatientAppointment][pa] ON [pa].[ID]=[pi].PatientAppointmentID 
        WHERE  [pa].[id]=@patientApptID
        AND [icwi].[ItemComboWarningid]=@ItemComboWarningid) 

 IF @@ROWCOUNT = 0 
 BEGIN 
    SET @iwcID =  @ItemComboWarningid; 
 END

 FETCH NEXT FROM warning_cursor INTO @ItemComboWarningid
 END
 CLOSE warning_cursor;  
 DEALLOCATE warning_cursor;
 RETURN @iwcID

我尝试的是

Select [icw].[id], [icw].[Message]
FROM  [dbo].[ItemComboWarning] [icw] 
WHERE NOT EXISTS (  Select * from (SELECT [icwi].[itemid]
                    FROM [dbo].[ItemComboWarning] [icw2] 
                    INNER JOIN [dbo].[ItemComboWarningItem][icwi] ON [icw2].[ID]=[icwi].[ItemComboWarningID]  
                    INNER JOIN [dbo].[PatientItem][pi] on [pi].[ItemID]=[icwi].[itemID] 
                    INNER JOIN [dbo].[PatientAppointment][pa] ON [pa].[ID]=[pi].PatientAppointmentID 
                    WHERE  [pa].[id]=3712182
                    AND [icwi].[ItemComboWarningid]=[icw].[id] 
                    EXCEPT 
                    (SELECT DISTINCT [pi].[itemID] 
                    FROM [dbo].[PatientItem][pi]  
                    INNER JOIN [dbo].[PatientAppointment][pa] ON [pa].[ID]=[pi].PatientAppointmentID 
                    INNER JOIN [dbo].[ItemComboWarningItem][icwi2] ON  [pi].[ItemID]=[icwi2].[itemID] 
                    WHERE  [pa].[id]=3712182) 

                  UNION
                ( SELECT DISTINCT [pi].[itemID] 
                  FROM [dbo].[PatientItem][pi]  
                        INNER JOIN [dbo].[PatientAppointment][pa] ON [pa].[ID]=[pi].PatientAppointmentID 
                        INNER JOIN [dbo].[ItemComboWarningItem][icwi3] ON  [pi].[ItemID]=[icwi3].[itemID] 
                        WHERE  [pa].[id]=3712182) 
                        EXCEPT
                        (SELECT [icwi4].[itemid]
                        FROM [dbo].[ItemComboWarning] [icw4] 
                        INNER JOIN [dbo].[ItemComboWarningItem][icwi4] ON [icw4].[ID]=[icwi4].[ItemComboWarningID]  
                        INNER JOIN [dbo].[PatientItem][pi] ON [pi].[ItemID]=[icwi4].[itemID] 
                        INNER JOIN [dbo].[PatientAppointment][pa] ON [pa].[ID]=[pi].PatientAppointmentID 
                        WHERE  [pa].[id]=3712182
                        AND [icwi4].[ItemComboWarningid]=[icw].[id])))

但我收到此错误＆＃34;期待AS，ID或Quoted_ID＆＃34;。

主要想法是我想检查每个[icw]。[id]并且如果此查询没有返回任何行

SELECT [icwi].[itemid]
                      FROM [dbo].[ItemComboWarning] [icw2] 
                        INNER JOIN [dbo].[ItemComboWarningItem][icwi] ON [icw2].[ID]=[icwi].[ItemComboWarningID]  
                        INNER JOIN [dbo].[PatientItem][pi] on [pi].[ItemID]=[icwi].[itemID] 
                        INNER JOIN [dbo].[PatientAppointment][pa] ON [pa].[ID]=[pi].PatientAppointmentID 
                        WHERE  [pa].[id]=3712182
                        AND [icwi].[ItemComboWarningid]=**[icw].[id]** 
                        EXCEPT 
                        (SELECT DISTINCT [pi].[itemID] 
                         FROM [dbo].[PatientItem][pi]  
                         INNER JOIN [dbo].[PatientAppointment][pa] ON [pa].[ID]=[pi].PatientAppointmentID 
                         INNER JOIN [dbo].[ItemComboWarningItem][icwi2] ON  [pi].[ItemID]=[icwi2].[itemID] 
                         WHERE  [pa].[id]=3712182) 

                      UNION
                    ( SELECT DISTINCT [pi].[itemID] 
                      FROM [dbo].[PatientItem][pi]  
                            INNER JOIN [dbo].[PatientAppointment][pa] ON [pa].[ID]=[pi].PatientAppointmentID 
                            INNER JOIN [dbo].[ItemComboWarningItem][icwi3] ON  [pi].[ItemID]=[icwi3].[itemID] 
                            WHERE  [pa].[id]=3712182) 
                            EXCEPT
                            (SELECT [icwi4].[itemid]
                            FROM [dbo].[ItemComboWarning] [icw4] 
                            INNER JOIN [dbo].[ItemComboWarningItem][icwi4] ON [icw4].[ID]=[icwi4].[ItemComboWarningID]  
                            INNER JOIN [dbo].[PatientItem][pi] ON [pi].[ItemID]=[icwi4].[itemID] 
                            INNER JOIN [dbo].[PatientAppointment][pa] ON [pa].[ID]=[pi].PatientAppointmentID 
                            WHERE  [pa].[id]=3712182
                            AND [icwi4].[ItemComboWarningid]=**[icw].[id]**)

然后我要显示该ID。但我需要从外表中与 [icw]。[id] 进行链接。怎么做到呢？谢谢！