cicadabear / common_sql

Oracle temp tablespace management

Sort space usage by statement

SELECT   S.sid || ',' || S.serial# sid_serial, S.status, S.username,

T.blocks * TBS.block_size / 1024 / 1024 mb_used, T.tablespace,

T.sqladdr address, Q.hash_value, Q.sql_text

FROM     v$sort_usage T, v$session S, v$sqlarea Q, dba_tablespaces TBS

WHERE    T.session_addr = S.saddr

AND      T.sqladdr = Q.address (+)

AND      T.tablespace = TBS.tablespace_name

ORDER BY S.sid;

Sort space usage by session

SELECT   S.sid || ',' || S.serial# sid_serial, S.username, S.osuser, P.spid, S.module,

S.program, SUM (T.blocks) * TBS.block_size / 1024 / 1024 mb_used, T.tablespace,

COUNT(*) sort_ops

FROM     v$sort_usage T, v$session S, dba_tablespaces TBS, v$process P

WHERE    T.session_addr = S.saddr

AND      S.paddr = P.addr

AND      T.tablespace = TBS.tablespace_name

GROUP BY S.sid, S.serial#, S.username, S.osuser, P.spid, S.module,

S.program, TBS.block_size, T.tablespace

ORDER BY sid_serial;

Listing Enabled Events

SET SERVEROUTPUT ON
DECLARE
    l_level NUMBER;
BEGIN
    FOR l_event IN 10000..60999
    LOOP
        dbms_system.read_ev (l_event,l_level);
        IF l_level > 0 THEN
            dbms_output.put_line ('Event '||TO_CHAR (l_event)||
            ' is set at level '||TO_CHAR (l_level));
        END IF;
    END LOOP;
END;
/

Oracle sql get top n for each group

select *
from (select emp_id, name, occupation,
      rank() over ( partition by occupation order by emp_id) rank
      from employee)
where rank <= 3

get-top-results-for-each-group-in-oracle