EXEC动态填充表赋空值解决方法

EXEC动态填充表赋空值
[code=SQL][/code]
alter procedure tiaoshi
 @tablename nvarchar(80),
 @rowindex nvarchar(8)
as
 declare @sql varchar(8000)
 set @sql='declare @order table(sequence int, uut nvarchar(8) null) insert into @order select sequence from'+@tablename+'insert into @order values(' +@roeindex+ ',null) select * from @order order by sequence'
 exec(@sql)
 return
报错，显示输入参数不符合定义，我希望达到的目的是列uut输入为空值，尝试过将列的默认值设置为空，插入一个参数，结果也是报错，显示参数个数不对，希望高手指点

[解决办法]

SQL code

--alter procedure tiaoshi declare @tablename nvarchar(80)  declare @rowindex nvarchar(8)--as declare @sql varchar(8000) set @sql='declare @order table(sequence int, uut nvarchar(8) null)            insert into @order                  --这个地方添加上列名sequence  insert into @order         select sequence from'+@tablename+'                insert into @order         values(' +@rowindex+ ',null)         --允许null的列，可以不写   values(' +@rowindex+ ')                select * from @order         order by sequence'         print @sql  --拼接后的字符串，LZ最好print出来看看  --exec(@sql) --return