Re: Is it possible to get a subset of a result set?

Hey Steven,

     Try the following to time the query and it will give you the time it took to execute. I would be interested to see how long it took on your system. You can also take a look at the foo variable to see if you are getting the correct number of results.

Jay!!!

DECLARE
   time_before BINARY_INTEGER;
   time_after BINARY_INTEGER;
   foo INTEGER;
BEGIN
   time_before := DBMS_UTILITY.GET_TIME;

   SELECT count(*)

     INTO foo
     FROM (select employee, rank
             from (select emp1.emp_name employee, count(*) rank
                     from temp_emp emp1,
                          temp_emp emp2
                    where emp1.emp_name >= emp2.emp_name
                    group by emp1.emp_name)
            where rank between 8000 and 8500);

   time_after := DBMS_UTILITY.GET_TIME;    DBMS_OUTPUT.PUT_LINE ((time_after - time_before) / 100 || ' seconds'); END; Steven Hill wrote:

> Interesting solution. Any idea how slow is "slow" for a result set, say
> 10000 rows are returned from the subquery in the from clause, min_rank is
> 8000 and max_rank is 8500? Assume emp_name is indexed.
>
> Steven Hill
>
Received on Wed Sep 22 1999 - 10:43:21 CDT