สอบถามการส่งชื่อตารางเป็นพารามิเตอร์ใน Store Procedure ทำอย่างไรครับ

ALTER PROCEDURE [dbo].[t_work] 
	@wl_id_m int,
		@wl_id_e int,
		@wl_id_n int,
		@tbl_name nvarchar(20),
		@day_no nvarchar(10),
		@day_month nvarchar(10),
		@day_years nvarchar(10),
		@table_name nvarchar(100)
AS
BEGIN
	declare @Work_Status nvarchar(20)

	SET NOCOUNT ON;

	declare @sql nvarchar(max); 

    DECLARE  ENS_cursor cursor for
 select wl_id 
 from [ENS].[dbo].[tblWorkList]
 where wl_id_m = @wl_id_m and wl_id_e = @wl_id_e and wl_id_n = @wl_id_n 
    OPEN ENS_cursor
    FETCH NEXT FROM ENS_cursor 

 INTO @Work_Status 
    WHILE @@FETCH_STATUS = 0

    BEGIN  	
				SET @sql = "
				update " + @table_name + " --ตรงนี้อยากแทนชื่อตารางด้วย @tbl_name
				set t_work_status = " + @Work_Status + "
				where t_day_no = " + @day_no + " and t_month_no = " + @day_month + " and t_year_no = " + @day_years + " ";
				exec @sql;


        FETCH NEXT FROM ENS_cursor 
   INTO @Work_Status
        END
    CLOSE ENS_cursor
    DEALLOCATE ENS_cursor
END

The name 'update [SKTH_ENSUSER].[dbo].tblP30006
set t_work_status = 19
where t_day_no = 01 and t_month_no =03 and t_year_no = 2017' is not a valid identifier.

'update [SKTH_ENSUSER].[dbo].tblP30006
set t_work_status = 19
where t_day_no = '01' and t_month_no ='03' and t_year_no = 2017'

SET @sql = 	N'update [SKTH_ENSUSER].[dbo].'+@tbl_name+'
                set t_work_status = '+@Work_Status+'
                where t_day_no = '''+@day_no+''' and t_month_no ='''+ @day_month+''' and t_year_no = '+@day_years+''	
	Exec @sql;

SET @sql = N'update [SKTH_ENSUSER].[dbo].'+@tbl_name+'
set t_work_status = '+@Work_Status+'
where t_day_no = '''+@day_no+''' and t_month_no ='''+ @day_month+''' and t_year_no = '+@day_years+''
EXEC sp_executesql @sql;