declare @n int
 set @n=5
 drop table #temp
 select identity(int,1,1) as id,* into #temp from cpkhdm1 ;
 select * from #temp where id between @n and @n

上面两条语句可以，但想改成一条语句却出错:
 select top 1 [款号],[图片],[myId] from [dqgl2016].[dbo].[cpkhdm1] where [myid] not in (select top @n [myid] from [dqgl2016].[dbo].[cpkhdm1])
好象不能用变量n,改为常数又可以，为什么
 select top 1 [款号],[图片],[myId] from [dqgl2016].[dbo].[cpkhdm1] where [myid] not in (select top 5 [myid] from [dqgl2016].[dbo].[cpkhdm1])

还是经验重要啊，昨晚自己弄了一晚上都搞不定 ,原来如此简单，在sql2008中只需加个( )

另外在sql2000中刚才测试了declare @n int,@strSql varchar(1000)
set @strSql='select top '+convert(varchar,@p)+' * from 表名'
exec @strSql
会出错，提示找不到存储过程@strSql
要改为exec (@strSql）才OK

查询第N条记录 sql2008正确语句：
declare @n int
set @n=5
select top 1 [款号],[图片],[myId] from [dqgl2016].[dbo].[cpkhdm1] where [myid] not in (select top (@n-1) [myid] from [dqgl2016].[dbo].[cpkhdm1])

定义了一个存储过程，然后，查 首记录，前一条，后一条，最后一条  只要控制改变参数 n(全局变量) 全搞定
CREATE PROCEDURE check1
@n int
AS
BEGIN
  SET NOCOUNT ON;
  declare @i int
 select @i =count(*) from cpkhdm1
    if @i<@n
       begin
         set  @n=@i
       end   
   select top 1 款号,图片,myId from dbo.cpkhdm1 where myid not in (select top (@n-1) myid from dbo.cpkhdm1);
   SET NOCOUNT Off;
 END