-- 建表语句
CREATE   TABLE   [ MyTable ]  (
     [ MyId ]   [ varchar ]  ( 50 ) COLLATE Chinese_PRC_CI_AS  NULL  ,
     [ MyName ]   [ varchar ]  ( 50 ) COLLATE Chinese_PRC_CI_AS  NULL  
)  ON   [ PRIMARY ]
GO

-- 得到新的编号（不考虑补号）
create   function  f_NextID( @myDate   datetime )
Returns   char ( 12 )
as
begin  
     Declare   @temp   char ( 6 )
      Declare   @ret   char ( 12 )
     set   @temp = Substring ( Convert ( char , @myDate ), 9 , 2 ) + Substring ( Convert ( char , @myDate ), 1 , 2 ) + Substring ( Convert ( char , @myDate ), 4 , 2 )
     if ( @temp   in  ( SELECT   distinct  myid = left (myid, 6 )  FROM  mytable  WITH (XLOCK,PAGLOCK)))
             Select   @ret = @temp + right ( 1000001 + Isnull ( Max ( Right (MyID, 6 )), 0 ), 6 )  from  Mytable  with (xlock,paglock)  where   @temp = left (MyID, 6 )
     else
         Select   @ret = @temp + ' 000001 '   from  Mytable  with (xlock,paglock)
     return   @ret
end  
GO


drop   table  MyTable
-- 建表语句
CREATE   TABLE   [ MyTable ]  (
     [ MyId ]   [ varchar ]  ( 50 ) COLLATE Chinese_PRC_CI_AS  NULL  ,
     [ MyName ]   [ varchar ]  ( 50 ) COLLATE Chinese_PRC_CI_AS  NULL  
)  ON   [ PRIMARY ]
GO

-- 得到新的编号（融合了补号处理）
create   FUNCTION  f_NextNewID( @myDate   datetime )
RETURNS   char ( 12 )
AS
BEGIN
     Declare   @temp   char ( 6 )
      Declare   @ret   char ( 12 )
     set   @temp = Substring ( Convert ( char , @myDate ), 9 , 2 ) + Substring ( Convert ( char , @myDate ), 1 , 2 ) + Substring ( Convert ( char , @myDate ), 4 , 2 )
     DECLARE   @r   char ( 12 )
    
     SELECT   @r = @temp + RIGHT ( 1000001 + MIN (MyId), 6 )
     FROM (
         SELECT  MyId = RIGHT (MyId, 6 )  FROM  MyTable  WITH (XLOCK,PAGLOCK)
         UNION   ALL   SELECT   0
    )a 
   WHERE   NOT   EXISTS (
         SELECT   *   FROM  MyTable   WITH (XLOCK,PAGLOCK)
         WHERE  MyId = @temp + RIGHT ( 1000001 + a.myID, 6 ))
     RETURN ( @r )
END
GO


-- 测试语句(可改变时间测试一下）
insert  MyTable  values  (dbo.f_NextNewID( GetDate ()), ' one ' )
insert  MyTable  values  (dbo.f_NextNewID( GetDate ()), ' two ' )
insert  MyTable  values  (dbo.f_NextNewID( GetDate ()), ' three ' )
insert  MyTable  values  (dbo.f_NextNewID( GetDate ()), ' four ' )
insert  MyTable  values  (dbo.f_NextNewID( GetDate ()), ' five ' )
insert  MyTable  values  (dbo.f_NextNewID( GetDate ()), ' six ' )
Select   *   from  MyTable  order   by  MyId
GO
delete  MyTable  where  myId = ' 060629000002 '
delete  MyTable  where  myId = ' 060629000005 '
Select   *   from  MyTable  order   by  MyId
Go
insert  MyTable  values  (dbo.f_NextNewID( GetDate ()), ' nexttwo ' )
insert  MyTable  values  (dbo.f_NextNewID( GetDate ()), ' nextfive ' )
Select   *   from  MyTable  order   by  MyId
GO



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SQL下测试成功