创建存储过程之前判断是否存在

if   exists  ( select   *   from  dbo.sysobjects  where  id  =   object_id (N ' [dbo].[UP_forums_CodeScheduleType_Update] ' )  and   OBJECTPROPERTY (id, N ' IsProcedure ' )  =   1 )
drop   procedure   [ dbo ] . [ UP_forums_CodeScheduleType_Update ]
GO
-- ----------------------------------
-- 用途：修改一条记录 
-- 项目名称：CodematicDemo
-- 说明：
-- 时间：2008-9-12 16:30:44
-- ----------------------------------
CREATE   PROCEDURE  UP_forums_CodeScheduleType_Update
@ScheduleTypeCode   int ,
@ScheduleDescription   varchar ( 30 )
  AS  
     UPDATE  forums_CodeScheduleType  SET  
     [ ScheduleDescription ]   =   @ScheduleDescription
     WHERE  ScheduleTypeCode = @ScheduleTypeCode  

GO