Некоторые запросы к базе данных Oracle:

-- Какие компоненты установлены
SQL> select comp_id, comp_name, version, status from dba_registry;

--  Версия БД с учетом установленных PSU.
-- 12 и 21+ версий
declare
  l_rel int;
  l_ver varchar2(30);
begin
  select  to_number(substr(version,1,instr(version,'.')-1)) into l_rel from v$instance;
  $IF DBMS_DB_VERSION.version = 11 $THEN
    select version into l_ver from v$instance;
  $ELSIF DBMS_DB_VERSION.version = 12 $THEN
    select full_ver
    into l_ver
    from (SELECT t.version||'.'||bundle_id full_ver,t.description
          FROM   dba_registry_sqlpatch t
          where  flags = 'NB'
          order by action_time desc)
    where rownum=1;
  $ELSIF DBMS_DB_VERSION.version > 12 $THEN
    select version_full into l_ver from v$instance;
  $END
  DBMS_OUTPUT.PUT_LINE( l_ver);
end;
/

select samp.dbid, fu.name, samp.version, detected_usages, total_samples,
  decode(to_char(last_usage_date, 'MM/DD/YYYY, HH:MI:SS'),
          NULL, 'FALSE',
          to_char(last_sample_date, 'MM/DD/YYYY, HH:MI:SS'), 'TRUE',
          'FALSE')
  currently_used, first_usage_date, last_usage_date, aux_count,
  feature_info, last_sample_date, last_sample_period,
  sample_interval, mt.description
  from wri$_dbu_usage_sample samp, wri$_dbu_feature_usage fu,
      wri$_dbu_feature_metadata mt
  where
  samp.dbid    = fu.dbid and
  samp.version = fu.version and
  fu.name      = mt.name and
  fu.name not like '_DBFUS_TEST%' and  /* filter out test features */
  bitand(mt.usg_det_method, 4) != 4    /* filter out disabled features */
/

SQL> alter system set RECYCLEBIN=off scope=BOTH;

SQL> select object_name, object_type from DBA_OBJECTS
WHERE status = 'INVALID';

SQL> alter system set db_create_file_dest="/u01/datafiles";

SQL> show parameter db_create_file_dest

SQL> SELECT n.username, s.sid, s.value
FROM v$sesstat s, v$statname t, v$session n
WHERE s.statistic# = t.statistic#
AND n.sid = s.sid
AND t.name='CPU used by this session'
ORDER BY s.value desc;

create sequence dept_seq start with 200 increment by 10;
insert into departments valuse (dept_seq.netxval, .......)

select * from source_locked l
where l.object_name = 'PRINT'

select *
from (select c.TABLESPACE_NAME,
c.segment_name "Object Name",
b.object_type,
sum(space_used_delta) / 1024 / 1024 "Growth(MB)"
from dba_hist_snapshot sn,
dba_hist_seg_stat a,
dba_objects b,
dba_segments c
where begin_interval_time > trunc(sysdate) - 30
and sn.snap_id = a.snap_id
and b.object_id = a.obj#
and b.owner = c.owner
and b.object_name = c.segment_name
—and c.owner = user
group by c.TABLESPACE_NAME, c.segment_name, b.object_type)
order by 4 desc;