必须声明标量变量？？？

Question

set ANSI_NULLS OFF
set QUOTED_IDENTIFIER OFF
GO
ALTER         PROCEDURE [dbo].[z_Clienteligib_update]@creationtimestamp datetime,
@user_id varchar(20),
@survey_id  varchar(50),
@facility_id  varchar(20),
@eligibility_id  varchar(20),
@onfilecount  varchar(20),
@submitted  varchar(20),
@firstname varchar(50),
@lastname  varchar(50),
@aliases  varchar(255),
@medrecnum   datetime,
@sd_id  varchar(20)
ASGO
BEGIN
update survey
set creationtimestamp=@creationtimestamp,user_id=@user_id,survey_id=@survey_id,facility_id=@facility_id,eligibility_id=@eligibility_id,onfilecount=@onfilecount,submitted=@submitted,firstname=@firstname,lastname=@lastname,aliases=@aliases,medrecnum=@medrecnum
where sd_id=@sd_idEND
这个存储过程总是提示消息 137，级别 15，状态 2，第 3 行
必须声明标量变量 "@creationtimestamp"。求救啊

Answer 1

ALTER        PROCEDURE [dbo].[z_Clienteligib_update] @creationtimestamp datetime, 
@user_id varchar(20), 
@survey_id  varchar(50), 
@facility_id  varchar(20), 
@eligibility_id  varchar(20), 
@onfilecount  varchar(20), 
@submitted  varchar(20), 
@firstname varchar(50), 
@lastname  varchar(50), 
@aliases  varchar(255), 
@medrecnum  datetime, 
@sd_id  varchar(20) 
AS BEGIN 
update survey 
set creationtimestamp=@creationtimestamp,user_id=@user_id,survey_id=@survey_id,facility_id=@facility_id,eligibility_id=@eligibility_id,onfil ecount=@onfilecount,submitted=@submitted,firstname=@firstname,lastname=@lastname,aliases=@al iases,medrecnum=@medrecnum 
where sd_id=@sd_id ;END 

Answer 2

不行啊 加括号也没用 AS后面本来就有GO