Oracle - Last slow commands in database

There are a lot of ways to monitor Oracle Database.

With the select below you can list the SQL, time, and other informations of your slowly transactions.

select v.SQL_TEXT,

           v.PARSING_SCHEMA_NAME,

           v.FIRST_LOAD_TIME,

           v.DISK_READS,

           v.ROWS_PROCESSED,

           v.ELAPSED_TIME,

           v.service

      from v$sql v

where

  to_date(v.FIRST_LOAD_TIME,'YYYY-MM-DD hh24:mi:ss')>ADD_MONTHS(trunc(sysdate,'MM'),-2)

  and PARSING_SCHEMA_NAME not in ('SYS', 'SYSTEM');