SQL server如何实现以星期制和时间制的组合为插入条件，以实现将数据插入不同的字段中

如题，现在我的存储过程，数据插入的先前条件是，按照每天的时间，
每天早8点到晚8点这个时间段内，数据就往字段"Montime-8:00AM-8:00PM"插入，其余
时间（即晚8点到第二天早上8:00），数据就往另一字段"Montime-8:00PM-8:00AM"插入，
附上我的存储过程代码和table5表格的构造：

table5表格字段构造

目前已实现的时间段不同插入不同字段的存储过程代码：
USE [plc]
GO
/****** Object: StoredProcedure [dbo].[sp_table5_insert] Script Date: 05/28/2018 08:59:40 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- 插入T5逻辑实现
ALTER proc [dbo].[sp_table5_insert]
@_T4ID BIGINT -- machine-status=0的自增id
as

BEGIN

    -- 上一条错误代码记录id
DECLARE @_T4ErrorCodeID BIGINT

-- 分钟时差
DECLARE @_timeDifferenceMin BIGINT

--时间段变量
DECLARE @shi int
set @shi=DateName(hour,GetDate())

-- 开始时间
DECLARE @_machineItime VARCHAR(50)

-- 获取上一条错误代码记录id并且计算以分钟为单位的时差
SELECT TOP 1 @_T4ErrorCodeID = id, @_timeDifferenceMin = DATEDIFF(S,ng_itime,(SELECT machine_itime FROM table4 
WHERE id = @_T4ID))
        FROM table4 
        WHERE id < @_T4ID AND location IS NOT NULL AND pointer IS NOT NULL AND ng_itime IS NOT NULL 
        ORDER BY id DESC;

--判断时间，早8点到晚8点
if(@shi>8 and @shi<20)
begin
-- 对T5表操作，存在类型累加时间，不存在新增
IF EXISTS (SELECT * FROM table5 AS t5 LEFT JOIN table4 AS t4 ON t4.location=t5.location AND t4.pointer=t5.pointer 
WHERE t4.id=@_T4ErrorCodeID)
    -- 修改
    UPDATE table5 
            SET [Montime_8:00AM-8:00PM] = ISNULL([Montime_8:00AM-8:00PM],0) + @_timeDifferenceMin 
            FROM table5  AS t5, table4 AS t4
            WHERE t4.location=t5.location AND t4.pointer=t5.pointer AND t4.id=@_T4ErrorCodeID;
ELSE
    -- 插入
    INSERT INTO table5(location,pointer,[Montime_8:00AM-8:00PM])      
        SELECT location,pointer,@_timeDifferenceMin
              FROM table4     
              WHERE id = @_T4ErrorCodeID; 
end

--判断时间，晚8点到早8点
else
begin
-- 对T5表操作，存在类型累加时间，不存在新增
IF EXISTS (SELECT * FROM table5 AS t5 LEFT JOIN table4 AS t4 ON t4.location=t5.location AND t4.pointer=t5.pointer 
WHERE t4.id=@_T4ErrorCodeID)
    -- 修改
    UPDATE table5 
            SET [Montime_8:00PM-8:00AM] = ISNULL([Montime_8:00PM-8:00AM],0) + @_timeDifferenceMin 
            FROM table5  AS t5, table4 AS t4
            WHERE t4.location=t5.location AND t4.pointer=t5.pointer AND t4.id=@_T4ErrorCodeID;
ELSE
    -- 插入
    INSERT INTO table5(location,pointer,[Montime_8:00PM-8:00AM])      
        SELECT location,pointer,@_timeDifferenceMin
              FROM table4     
              WHERE id = @_T4ErrorCodeID; 

END
END

现在就是想，SQL server能不能实现以星期制和时间制的组合为条件，来实现插入不同字段
例如：星期一的早8:00到晚8：00，插入这一个字段，晚8：00到第二天星期二的早8:00插入另一个字段，就是要这种效果

或许大家还有什么更好的解决办法可以说出来跟我讨论下，方便讨论我留下我的QQ号码:584958184，本人实习生，刚出来，懂得东西不多，很多代码也是求助网上解决的，望各路大佬、大神相助与小弟~！！感激不尽~！！

IF OBJECT_ID ('dbo.varbin2hexstr') IS NOT NULL
DROP FUNCTION dbo.varbin2hexstr
GO
CREATE function varbin2hexstr(
@bin varbinary(8000)
)returns varchar(8000)
as
begin
declare @re varchar(8000),@i int
select @re='',@i=datalength(@bin)
while @i>0
select @re=substring('0123456789ABCDEF',substring(@bin,@i,1)/16+1,1)
+substring('0123456789ABCDEF',substring(@bin,@i,1)%16+1,1)
+@re
,@i=@i-1
-- return('0x'+@re)
return @re
end
GO

 IF OBJECT_ID ('dbo.varbin2hexstr') IS NOT NULL 
DROP FUNCTION dbo.varbin2hexstr 
GO 
CREATE function varbin2hexstr( 
@bin varbinary(8000) 
)returns varchar(8000) 
as 
begin 
declare @re varchar(8000),@i int 
select @re='',@i=datalength(@bin) 
while @i>0 
select @re=substring('0123456789ABCDEF',substring(@bin,@i,1)/16+1,1) 
+substring('0123456789ABCDEF',substring(@bin,@i,1)%16+1,1) 
+@re 
,@i=@i-1 
-- return('0x'+@re) 
return @re 
end 
GO 

这问题这么难吗？？？0.0 我原以为只是创建一个变量，赋值给星期函数，然后与时间段条件合并一起就阔以实现了 似乎不能这么简单就实现呢。。。

定时任务不是可以控制吗。。。

还有没有人有其他想法啊。。。我真的是小白一枚。。。这个效果该怎么实现。。。

构造SQL，然后把字段用变量替换不就行了？
大概就是下面的意思，可能有些错误，你看着整一下吧。

 if(@shi>8 and @shi<20)
            set @colname='Montime_8:00AM-8:00PM'
else
        set @colname='Montime_8:00PM-8:00AM'

set @sql='IF EXISTS (SELECT 1 FROM table5 AS t5 LEFT JOIN table4 AS t4 ON t4.location=t5.location AND t4.pointer=t5.pointer 
WHERE t4.id='+@_T4ErrorCodeID+')
    -- 修改
    UPDATE table5 
            SET ['+@colname+'] = ISNULL(['+@colname+'],0) + '+@_timeDifferenceMin +'
            FROM table5  AS t5, table4 AS t4
            WHERE t4.location=t5.location AND t4.pointer=t5.pointer AND t4.id='+@_T4ErrorCodeID+';
ELSE
    -- 插入
    INSERT INTO table5(location,pointer,['+@colname+'])      
        SELECT location,pointer,'+@_timeDifferenceMin+'
              FROM table4     
              WHERE id = '+@_T4ErrorCodeID+'; '
exec(@sql)

谢谢 问题我自己已经解决了 非常感谢大家~！！