在sql查询中使用表变量

USE [DAF_DB]
GO
/****** Object:  StoredProcedure [dbo].[PROG_WORKTASK_List]    Script Date: 06/14/2010 21:14:43 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

--[PROG_WORKTASK_List] 62,0,'','',0,0,'',''

-- =============================================
-- Author:        guo.lin
-- Create date: 2010-03-10
-- Description:    获取工作任务单列表，根据相关条件
-- =============================================
ALTER PROCEDURE [dbo].[PROG_WORKTASK_List] 
    @userID varchar(10),    ---当前用户
    @status int,    ---状态
    @Leader varchar(30),
    @Facilitators varchar(30),
    @Level int ,
    @Priority int,
    @CloseDT varchar(30),
    @CreatedBy varchar(30)

AS
BEGIN
    declare @result table(
        taskid int,
        TaskName nvarchar(100),
        TaskTopic nvarchar(100),
        Level varchar(10),
        Priority varchar(10),
        Status varchar(10),
        Leader varchar(100),
        strLeader nvarchar(500),
        Facilitators varchar(100),
        cycletime varchar(10),
        CloseDT datetime,
        Createddt datetime,
        CreatedBy varchar(30)
    )
    
    insert into @result select taskid,TaskName,TaskTopic,Level,Priority,Status,Leader,strLeader,Facilitators,cycletime,CloseDT,Createddt,CreatedBy 
        from Work_TaskProcess where createdby=@CreatedBy or leader like '%|'+@userid+'|%' or Facilitators like '%|'+@userid+'|%'

    if (@status <>0)
        delete @result where status<>@status
    if (@Leader<>'')
        delete @result where leader not like '%|'+@Leader+'|%'
--    if (@CreatedBy<>'')
--        delete @result where CreatedBy<>@CreatedBy
    if (@Level <> 0) 
        delete @result where level<>@level
    if (@Priority <> 0)
        delete @result where Priority<>@Priority
    if (@CloseDT<>'')
        delete @result where CloseDT<>@CloseDT

    update @result set status=b.itemtext from @result a,DAF_Item b where a.Status=b.itemvalue and b.itemtype='worktaskStatus'
    update @result set Level=b.itemtext from @result a,DAF_Item b where a.Level=b.itemvalue and b.itemtype='worktaskLevel'
    update @result set Priority=b.itemtext from @result a,DAF_Item b where a.Priority=b.itemvalue and b.itemtype='worktaskPriority'
    update @result set createdby=b.username from @result a, DAF_useraccount b where a.createdBy=b.userid
    update @result set cycletime=cycletime+'天'

    
    select taskid,TaskName,TaskTopic,Level,Priority,Status,strLeader,Facilitators,cycletime,CloseDT,Createddt,CreatedBy from @result order by Createddt desc

END