create table company
(dep char(10) not null,
val1 int unsigned not null
);
insert into company values 
('市場部', 26),
('市場部',25),
('市場部',24),
('辦公室',16),
('辦公室',12),
('研發部',19),
('研發部',11); 

1）、迴圈實現

DELIMITER $$

CREATE DEFINER=`root`@`%` PROCEDURE `sp_generate_auto`()
BEGINdeclare cnt intdefault0;
declare i intdefault0;  
 
droptableifexists tmp;
  -- Temporary table to save the result.
createtemporarytable tmp like company;
altertable tmp add num int unsigned notnull;
selectcount(1) as total from (selectcount(1) from company where1groupby dep) T into cnt;
while i < cnt
  do   
set@stmt= concat('select dep from company where 1 group by dep order by dep asc limit 
 
',i,',1 into @t_dep');
prepare s1 from@stmt;
execute s1;
deallocateprepare s1;
set@stmt=NULL;
set@num=0;
set@stmt2= concat('insert into tmp select dep,val1,@num := @num + 1 as sequence from company where dep = ''',@t_dep,''' order by dep asc');
prepare s1 from@stmt2;
execute s1;
deallocateprepare s1;
set@stmt2
 
=NULL;
set i = i +1;
endwhile;
select*from tmp;
set@t_dep=NULL;
END$$

DELIMITER ;

2）、遊標實現

DELIMITER $$



DROP PROCEDURE IF EXISTS `sp_generate_auto_cursor`$$



CREATE DEFINER=`root`@`%` PROCEDURE `sp_generate_auto_cursor`()

BEGIN

  declare done1 int default 0;

  declare a char(10);

  declare i int unsigned default 0;
  -- Cursor one to get the group total
  declare cur1 cursor for select dep from company group by dep;

  declare continue handler for 1329 set done1 = 1;

  -- Temporary table to save the result.
  drop table if exists tmp;

  create table tmp like company;

  alter table tmp add num int unsigned not null;

  open cur1;

  while done1 != 1

  do

    fetch cur1 into a;

    if not done1 then

      set @i = 0;

      begin

      declare done2 int default 0;

      declare b int unsigned default 0;

      declare c int unsigned default 0;
 -- Cursor two to get per group total.
      declare cur2 cursor for select val1,@i := @i + 1 from company where dep = a; 

      declare continue handler for 1329 set done2 = 1;

        open cur2;

        while done2 <> 1

        do

          fetch cur2 into b,c;

          if not done2 then

            insert into tmp select a,b,c;

          end if;          

        end while;

        close cur2;

      end;

    end if;

  end while;

  close cur1;

  select * from tmp;

END$$



DELIMITER ;


call sp_generate_auto();
call sp_generate_auto_cursor();

query result(7 records)

uery result(7 records)

(7 row(s)returned)
(15 ms taken)

(0 row(s)affected)
(0 ms taken)

(7 row(s)returned)
(16 ms taken)

(0 row(s)affected)
(0 ms taken)