Sql循環語句小例子！

例子1：

declare @a int

set @a=1

while @a<=要循環的次數

begin update table set Id=@a

@a=@a+1

end

例子2：

declare @month_tmp varchar(2);
declare @day_tmp varchar(2);
set @month_tmp = '1';
set @day_tmp = '1';
while(@month_tmp < '13')
begin
   while(@day_tmp < '30')
    begin
     select * from table1 where month=@month_tmp and day=@day_tmp
     set @day_tmp = @day_tmp + 1
    end
   set @month_tmp = @month_tmp + 1
   set @day_tmp = 1