創建函數時的錯誤

Question

這種情況跟我上一個問題有關，但我已經用了另一種方式，因爲我發現我正在嘗試做的事，我不能在視圖中做，它需要成爲一個功能。

但是我有連接到該線程的底部的代碼，但我得到這些錯誤：

Msg 4104, Level 16, State 1, Procedure fn_COT_TEST, Line 27 [Batch Start Line 0] 
The multi-part identifier "Contact_Group_Contacts_T.Relationship_Code_ID" could not be bound. 
Msg 4104, Level 16, State 1, Procedure fn_COT_TEST, Line 27 [Batch Start Line 0] 
The multi-part identifier "Contact_Group_Contacts_T.Relationship_Code_ID" could not be bound. 
Msg 4104, Level 16, State 1, Procedure fn_COT_TEST, Line 27 [Batch Start Line 0] 
The multi-part identifier "Contact_Group_Contacts_T.Relationship_Code_ID" could not be bound. 
Msg 4104, Level 16, State 1, Procedure fn_COT_TEST, Line 27 [Batch Start Line 0] 
The multi-part identifier "Contact_Group_Contacts_T.Relationship_Code_ID" could not be bound. 
Msg 4104, Level 16, State 1, Procedure fn_COT_TEST, Line 27 [Batch Start Line 0] 
The multi-part identifier "Contact_Group_Contacts_T.Relationship_Code_ID" could not be bound. 
Msg 4104, Level 16, State 1, Procedure fn_COT_TEST, Line 27 [Batch Start Line 0] 
The multi-part identifier "Contact_Group_Contacts_T.Relationship_Code_ID" could not be bound. 
Msg 4104, Level 16, State 1, Procedure fn_COT_TEST, Line 27 [Batch Start Line 0] 
The multi-part identifier "Contact_Group_Contacts_T.Relationship_Code_ID" could not be bound. 
Msg 444, Level 16, State 2, Procedure fn_COT_TEST, Line 27 [Batch Start Line 0] 
Select statements included within a function cannot return data to a client. 
Msg 4104, Level 16, State 1, Procedure fn_COT_TEST, Line 29 [Batch Start Line 0] 
The multi-part identifier "Contact_Group_Contacts_T.Main_Group_Contact_BT" could not be bound. 
Msg 444, Level 16, State 2, Procedure fn_COT_TEST, Line 29 [Batch Start Line 0] 
Select statements included within a function cannot return data to a client. 
Msg 455, Level 16, State 2, Procedure fn_COT_TEST, Line 29 [Batch Start Line 0] 
The last statement included within a function must be a return statement. 

我的代碼如下。我盡我所能，但完全卡住了。我究竟做錯了什麼？

CREATE FUNCTION [dbo].[fn_COT_POA] (@CONTACT_ID INT) 
RETURNS VARCHAR 
AS 
BEGIN 

DECLARE @COUNT INT; 
SET @COUNT = 
(select COUNT(CONTACT_ID) 
from Contact_Group_Contacts_T 
where CONTACT_ID = @CONTACT_ID) 
RETURN @COUNT 

IF @COUNT > 1 
    select @CONTACT_ID where Contact_Group_Contacts_T.Relationship_Code_ID in (2801,2802,2803,2804,2805,2806,2807) 
    ELSE 
    select @CONTACT_ID where Contact_Group_Contacts_T.Main_Group_Contact_BT = 1 

END 
GO 

我所要做的僅僅是有這些關係的代碼標識的，如果他們沒有得到這些關係碼的ID，然後選擇具有main_group_contact_bt標誌爲1

聯繫人中選擇聯繫人感謝丹

Answer 1

這只是瞎猜看着你前面的問題之後，但也許你正在尋找的東西是這樣的：

create function dbo.udf_cot_poa (@group_id int) 
returns table 
as return 
select top 1 /* getting just the first one*/ 
    Contact.* 
from Contact_Group_Contacts_T as Grp 
    inner join contact_contacts_t as Contact 
    on grp.contact_id = contact.contact_id 
    and contact.current_status_id = 65 
    and contact.deceased_date_dt is null 
where grp.group_id = @contact_id 
    and grp.Removed_BT = 0 
order by case 
    when grp.Relationship_Code_ID in (2801,2802,2803,2804,2805,2806,2807) /* related first */ 
    then 0 
    when grp.Main_Group_Contact_BT = 1 /* this one second */ 
    then 1 
    else 2 /* if neither of those exist then whatever does */ 
    end 
go 

select * from dbo.udf_cot_poa(group_id);