V$sqlarea and cumulative values

Question

hi gurus,
does v$sqlarea provide cumulative values for a SQL?
for eg:
Step 1
SQL=select * from emp where empid=1
elapsed_time = 2829
Step 2
SQL=select * from emp where empid=1
elapsed_time = 2980
1) if the values are cumulative, is there a way to find the elapsed_time for the last executed SQL as in step 2?
2) is there any limit for the number of rows returned by v$sqlarea,(or when would be a particular SQL cleared from v$sqlarea)?
thanks,
charles

Answer 1

SELECT sql_text,
      executions,
      CEIL (cpu_time / GREATEST (executions, 1)) ave_cpu_time,
      CEIL (elapsed_time / GREATEST (executions, 1)) ave_elapsed_time,
      CEIL (disk_reads / GREATEST (executions, 1)) ave_disk_reads,
      persistent_mem per_mem,
      runtime_mem run_mem,
      CEIL (sorts / GREATEST (executions, 1)) ave_sorts,
      CEIL (parse_calls / GREATEST (executions, 1)) ave_parse_calls,
      CEIL (buffer_gets / GREATEST (executions, 1)) ave_buffer_gets,
      CEIL (rows_processed / GREATEST (executions, 1)) ave_row_proc
FROM v$sqlarea
WHERE sql_text = 'select * from emp where empid=1'Regards,
Mahesh Kaila