DECLARE @i integer,@old_id integer
select @i=1
DECLARE id_cursor CURSOR FOR select id from yourtable
OPEN id_cursor
while @i<=50
begin
FETCH NEXT FROM id_currsor
into @old_id
update youtable set id=200+@i where id=@old_id
select @i=@i+1
end
CLOSE id_cursor
DEALLOCATE id_cursor
go
