Count of records based on the month.

Question

I have a view, which loads data of logs for all the process that run daily in the user. I want to see how many number of records it stored in the month of February. So here is the query I have written. But I keep on getting this errors.
ORA-01722: invalid number error or If I use the TO_DATE function then it is giving ORA-01858: a non-numeric character was found where a numeric was expected.
SELECT proc_name , COUNT(*),start_dt
FROM vw_fvo_proc_log
WHERE TO_CHAR('start_dt','MMYYYY') = '022010'
GROUP BY proc_name,start_dt;Here is the definition of the view.
CREATE OR REPLACE FORCE VIEW vw_fvo_proc_log (
   proc_name,
   step_desc,
   start_dt,
   exec_time,
   rec_count,
   osuser,
   terminal
AS
   SELECT proc_name,
          step_desc,
          start_dt,
          (CASE EXTRACT (HOUR FROM exec_time)
              WHEN 0 THEN NULL
              ELSE EXTRACT (HOUR FROM exec_time) || ' Hr '
           END)
          || (CASE EXTRACT (MINUTE FROM exec_time)
                 WHEN 0 THEN NULL
                 ELSE EXTRACT (MINUTE FROM exec_time) || ' Min '
              END)
          || EXTRACT (SECOND FROM exec_time)
          || ' Sec'
             AS exec_time,
          rec_count,
          osuser,
          terminal
   FROM (SELECT proc_name,
                step_desc,
                start_dt,
                CAST ( ( (end_dt - start_dt) DAY TO SECOND) AS INTERVAL DAY TO SECOND
                   AS exec_time,
                (CASE rec_count WHEN -1 THEN NULL ELSE rec_count END)
                   AS rec_count,
                osuser,
                terminal
         FROM fvo_proc_log
         ORDER BY logid DESC)
/Exec_time will give the execution time of the each process (for each step of the process) ex: 16 Hr 58 Min 58 Sec, I am curious if I can be able to calculate the total time taken by the particular process.
Thanks for the help.

Answer 1

Yes. But you will need to be more specific as to what you mean by "execution time." Run time? CPU time? etc.