How to see what SQL queries are made to my Database Server?

Question

Hi all,
I'm a newbie. I'd like to know if there's a way to find out what SQL queries are being made to my Database server at the server end.
Is it possible that Oracle Database Manager logs this information (including the exact query/SQL)somewhere in its logs? How to enable such an option and/or view the recent SQL queries made ?
Please enlighten me. Thanks in advance.
Thanks and Regards
Sharat

Answer 1

"I checked the V$SQLTEXT view too. It has only 64 characters for SQL_TEXT field." Yes yes but you might have noticed that it also has the column called piece. The view shows the full SQL statement broken up into little pieces. Use ADDRESS and HASH_VALUE to link to v$sql. There is also a view V$SQLTEXT_WITH_NEWLINES that throws in some line separators to make it "easier" to read.
Example below shows full text of SQL statements currently executing.
SQL> column address noprint
SQL> column hash_value noprint
SQL> break on hash_value skip 1
SQL> select
  2     a.address, a.hash_value, b.sql_text
  3  from
  4     v$sql a, v$sqltext b
  5  where
  6     a.users_executing > 0
  7     and b.address = a.address
  8     and b.hash_value = a.hash_value
  9  order by
10     a.address, a.hash_value, b.piece ;
SQL_TEXT
select    a.address, a.hash_value, b.sql_text from    v$sql a, v
$sqltext b where    a.users_executing > 0    and b.address = a.a
ddress    and b.hash_value = a.hash_value order by    a.address,
a.hash_value, b.piece
begin quest_exec.get_message(:cmd, :peer, :owner, :folder, :scri
pt, :delay); end;
6 ligne(s) sélectionnée(s).
SQL> select
  2     a.address, a.hash_value, b.sql_text
  3  from
  4     v$sql a, v$sqltext_with_newlines b
  5  where
  6     a.users_executing > 0
  7     and b.address = a.address
  8     and b.hash_value = a.hash_value
  9  order by
10     a.address, a.hash_value, b.piece ;
SQL_TEXT
select
   a.address, a.hash_value, b.sql_text
from
   v$sql a, v
$sqltext_with_newlines b
where
   a.users_executing > 0
   and b
.address = a.address
   and b.hash_value = a.hash_value
order by
   a.address, a.hash_value, b.piece
begin quest_exec.get_message(:cmd, :peer, :owner, :folder, :scri
pt, :delay); end;
6 ligne(s) sélectionnée(s).