How to learn sql query's execution time?

Question

Hello All,
I am trying to find out the execution times of deterministic and non-deterministic function. Hence I have run following script and want to compare their execution times etc. Should I use v$sql? If so, which coloumns? Because I couln't find.
{code}
create table my_table
as
select mod(level,10)*10 col from dual connect by level <= 100 order by 1;
create or replace function my_det(giris number)
return number deterministic
is
  num number;
begin
  num :=giris*10;
  return num;
end;
create or replace function my_func(giris number)
return number
is
  num number;
begin
  num :=giris*10;
  return num;
end;
select my_det(col) from my_table;   --First I want to run this query
select my_func(col) from my_table;  --Then this query
{code}
What should I do in order to compare these two in terms of execution, fetch times, etc.?
Thanks in advance.

Answer 1

Hello NightWig
As you're on 11g, if you have queries that take more than a few seconds I'd definitely recommend looking at the real-time SQL monitor (assuming you're appropriately licensed). As the name suggests, it shows the progress of an SQL statement in real-time, breaking down how long each operation has taken with details of rows fetched so far. It also keeps details of recently executed queries for a short while so can see how your changes affect a statement.
Oracle SQL Monitoring documentation:http://docs.oracle.com/cd/E11882_01/server.112/e16638/instance_tune.htm#PFGRF94543
Thank you