Oracle Database - DB Administration

Oracle DB - GRANT all objects to.sql

-- Script per obtenir les sentencies que donarien tots els grants sobre cada objecte 
-- de l'esquema indicat &&schema_name a l'usuari indicat &&grantee_name:

set heading off pagesize 0 feedback off echo off verify off linesize 200

-- Getting the user schema we want privileges from
accept schema_name char prompt 'Application Schema Name:'

-- Getting the user schema we want to grant privileges to
accept grantee_name char prompt 'Grants to user :'

spool /tmp/givinggrants.sql

select (CASE
         WHEN
        object_type in ('VIEW','MATERIALIZED VIEW') THEN 'GRANT SELECT, INSERT, DELETE, UPDATE on '
         WHEN
         OBJECT_TYPE IN ('SEQUENCE') THEN 'GRANT SELECT ON '
         WHEN
         OBJECT_TYPE IN ('PACKAGE','PROCEDURE','FUNCTION','TYPE') THEN 'GRANT EXECUTE ON '
         WHEN
         OBJECT_TYPE LIKE 'DIRECTORY' THEN 'GRANT READ ON '
         ELSE 'NOT AN APPROPRIATE OBJECT'
 END ) ||OWNER||'.'||OBJECT_NAME||' TO &&grantee_name ;'
from all_objects
            where owner='&&schema_name'
     AND OBJECT_TYPE IN ('DIRECTORY','VIEW','MATERIALIZED VIEW','SEQUENCE','PACKAGE','PROCEDURE','FUNCTION','TYPE')
;

-- Now we do tables...we did not do tables from all objects because we need to
--    limit it to tables and not external tables or nested tables

select 'grant select, insert, delete, update on '||all_tables.owner||'.'||all_tables.table_name||' to &&grantee_name ;'
                 from all_tables
               where owner='&&schema_name' and all_tables.table_name not in
                    (select axt.table_name from all_external_tables axt
                           where axt.owner=all_tables.owner)
                    and all_tables.table_name not in
                       (select nst.table_name from all_nested_tables nst
                           where nst.owner=all_tables.owner)
;
-- Now we do the external tables
select 'grant select on '||owner||'.'||table_name||' to &&grantee_name ;'
from all_external_tables  where owner='&&schema_name'
;


undef schema_name
undef grantee_name
spool off

Oracle DB - Statistics

Hidden Virtual Columns - Extended Statistics
https://blogs.oracle.com/sql/ora-54033-and-the-hidden-virtual-column-mystery

Para detectarlas
select column_name, data_default, hidden_column 
from   user_tab_cols
where  table_name = 'TAB' and HIDDEN_COLUMN = 'YES';

Si queremos hacer cambios, drop y recrearlas.

- DROP extended stats:
exec dbms_stats.drop_extended_stats(user, 'tab', '(x, y)');

- CREATE extended stats:
select dbms_stats.create_extended_stats(user, 'tab', '(x, y)')
from   dual;

OracleDB-DB_Administration.sql

-- ***** ADMINISTRATION *****

-- https://oracle-base.com/dba/scripts


-- NLS parameters (Natural Language Specification)
SELECT * FROM V$NLS_PARAMETERS;

-- NLS parameters of Oracle server and the current session:
SELECT DB.PARAMETER, DB.VALUE "DATABASE", I.VALUE "INSTANCE", S.VALUE "SESSION"
FROM   NLS_DATABASE_PARAMETERS DB, NLS_INSTANCE_PARAMETERS I, NLS_SESSION_PARAMETERS S
WHERE  DB.PARAMETER=I.PARAMETER(+) AND DB.PARAMETER=S.PARAMETER(+)
ORDER BY 1;

Trick to get 1-7 Monday-Sunday independent of session Territory:
  WEEKDAY = 1 + TRUNC (dt) - TRUNC (dt, 'IW')
where TRUNC (dt, 'IW') returns the number in that NLS territory for the first day of the week.


-- **********************************************
-- ***************** SESSIONS *******************
-- **********************************************
select s.sid,"SERIAL#","USER#",username,command,lockwait,status,server,schemaname,osuser,process,machine,port,program, sql_id,prev_sql_id, prev_exec_start,module, blocking_session_status, final_blocking_session_status,event, wait_class, wait_time, seconds_in_wait, state 
FROM v$session s where osuser = 'raulmoreno'  order by MACHINE, prev_exec_start;



-- **********************************************
-- ***************** TABLESPACES ****************
-- **********************************************
-- Check TABLESPACE
SELECT 
   a.tablespace_name, 
   a.file_name, 
   a.bytes allocated_bytes, 
   b.free_bytes
FROM 
   dba_data_files a, 
   (SELECT file_id, SUM(bytes) free_bytes
    FROM dba_free_space b GROUP BY file_id) b
WHERE 
   a.file_id=b.file_id
   -- and TABLESPACE_NAME=''
ORDER BY 
   a.tablespace_name;
   
-- tablespace   file                                allocated   free
-- D_DPF_DATA	/CatSalud/datafiles/D_DPF_DATA.dbf	209715200	262144

SELECT 
       TABLESPACE_NAME TABLESPACE,
       FILE_ID,
       COUNT(*)    PIECES,
       SUM(BYTES)  FREE_BYTES,
       SUM(BLOCKS) FREE_BLOCKS,
       MAX(BYTES)  LARGEST_BYTES,
       MAX(BLOCKS) LARGEST_BLKS
FROM   
       SYS.DBA_FREE_SPACE
--Where TABLESPACE_NAME='D_DPF_DATA'
GROUP  BY TABLESPACE_NAME, FILE_ID;
/*
"TABLESPACE"       "FILE_ID"         "PIECES"        "FREE_BYTES"            "FREE_BLOCKS"          "LARGEST_BYTES"         "LARGEST_BLKS"                
"D_DPF_DATA"       "73"              "1"             "262144"                "32"                   "262144"                "32"                          
*/



-- ******************
-- *** TABLE SIZE ***
-- ******************
select segment_name, segment_type, bytes/1024/1024 as size_in_mb
from user_segments
where segment_name = :YOUR_TABLE
  or segment_name in (select segment_name from user_lobs where table_name = :YOUR_TABLE)
  or segment_name in (select index_name from user_indexes where table_name = :YOUR_TABLE);





-- ******************************************************
-- ******** alter table xxx disable table lock **********
-- ******************************************************
-- The "alter table xxx disable table lock" command is used with the "revoke DBA" privilege command to ensure 
-- that only the DBA can change a production table. The disable table lock command is an excellent safeguard 
-- for production tables.  

-- The following script will disable all production tables for the SCOTT schema:
connect scott/tiger;
spool /tmp/disable_table_lock.sql
select 'alter table scott.'||table_name||' disable table lock;' from user_tables;
spool off;
@/tmp/disable_table_lock