Server Administration :: How To Change Attributes Of Table From Nologging To Logging
Feb 27, 2012
How to change the attributes of a table from nologging to logging?
SQL> select table_name,LOGGING from dba_tables where owner='HXL';
TABLE_NAME LOG
------------------------------ ---
TB_OBJECTS NO
SQL> alter table hxl.tb_test logging;
Table altered.
SQL> select table_name,LOGGING from dba_tables where owner='HXL';
TABLE_NAME LOG
------------------------------ ---
TB_OBJECTS NO
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Sep 25, 2013
I've been an Oracle DBA for almost twenty years. In that time I have worked in various organisations - sometimes as a "permanent" employee (although nothing is permanent these days ) and other times as a contractor. I have been in my current role for the last six months since being made redundant from my last position.
In this organisation we support a lot of Oracle databases on many different servers spanning various networks. There are two DBAs who have been here for several years
However, they are both in the habit of logging in as SYSDBA for everything. They find it amusing that I refuse to do so for daily administration as I know that this is bad practice. Import and exports are even taken as SYS. Whenever I mention that it's bad practice they shrug it off saying that they've been doing it for years with no problems.
So I have been scouring Tahiti and Metalink looking for a definitive document from Oracle that states just why this is such bad practice. I would imagine that an import as SYS could have catastrophic consequences for the data dictionary if you're not careful, but I can't think of much else.
We've all seen Michel's default "just don't do it" message whenever a poster mentions that they have done something as SYS.
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Jun 26, 2012
When I try to log into my db with a specific user I get this message. Below is from the alert log. I can login as system just fine.
----- Error Stack Dump -----
ORA-00604: error occurred at recursive SQL level 1
ORA-01438: value larger than specified precision allowed for this column
ORA-06512: at line 2
Oracle 10g OEL 5.5
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Aug 10, 2011
Does dbms_redefinition can move the tablespace to another of a table,including indexes?
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May 16, 2011
A single master schema where many developers are accessing. all share same password.
now i would like to trace all the changes made by each users. so i create a individual users for all and grant permission to access that schema.do i have a possibility of auditing the changes did by each user for that particular schema
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Jul 20, 2012
I have a live OLTP system where i have delived a solution for performance tunning , as a part of performance tunning i have created a MV which as below. I have created MV with no logging option as this will be refreshed at 3 min interval. i have compared the AWR report prior to deploy MV and after deployment. After deployment it have increased the redo by 4 times. Is there any way i can reduce the redo and what is wrong with mv with nologging.
CREATE MATERIALIZED VIEW "OVSD"."GSP_RELATEDEVENTS1"
NOLOGGING
REFRESH FORCE
--START WITH SYSDATE NEXT SYSDATE + 3/1440
AS
[code]....
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Feb 24, 2012
what's your method,when you want to change the character set ?
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May 6, 2011
I want to enable unconditional table level supplemental logging on unique index columns.
But Alter table tablename add supplemental log data (unique index) columns always;
gives error.If i omit always it is accepting but while it unconditionally log the unique index columns.
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Aug 31, 2010
How to change db timezone parameter. My application team has asked me to change the db timzone parameter by following sql.
ALTER database SET TIME_ZONE = '+10:00';
Is this way is the correct one , and do we have any impact on database and does it require a db bounce.
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Sep 21, 2012
As per the bellow the default XML storage has been changed in 11gr2.
docs.oracle.com/cd/E11882_01/appdev.112/e10492/whatsnew.htm
Quote:
Oracle Database 11g Release 2 (11.2.0.2) New Features in Oracle XML DB
The following Oracle XML DB features are new in Oracle Database 11g Release 2 (11.2.0.2).
Default Storage Model for XMLType
The default XMLType storage model is used if you do not specify a storage model when you create an XMLType table or column. Prior to Oracle Database 11g Release 2 (11.2.0.2), unstructured (CLOB) storage was used by default. The default storage model is now binary XML storage.
We have a application which works fine on r1 but not on r2 due to this change, we are going to investigate resolving the issue on the application in the future, in the mean time we need to be able to use the CLOB storage.
Does any one know where we can change this functionality back to the pre 11gR2 change?
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Jan 25, 2013
Currently my oracle database character set is we8mswin1252 and it is only containing English data as well as spatial data (which is in English of course). I would like to change the Database character set so it could accept Arabic characters.
I have checked the below command on a test DB and it worked fine, but I want to know if it's recommended as a best practice when changing the character set to accept arabic and this won't corrupt my old entered Data ?
SHUTDOWN IMMEDIATE
STARTUP RESTRICT
ALTER DATABASE CHARACTER SET INTERNAL_USE AR8MSWIN1256
SHUTDOWN IMMEDIATE
STARTUP
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Feb 6, 2013
When I created a new oracle database the port number was 1521 (default), but I want to change it to 1522.
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Feb 6, 2010
i have a oracle server installed enterprise edition, for some reation i need to degrade the version from enterprise to standard
i need same tablespace,data's everything same as of now.
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Jul 11, 2011
I can not change the parameters RESOURCE_MANAGER_PLAN, at first, I set the parameters to DAYTIME,but when I restart my db,the parameters hold old values named MAXCAP_PLAN. Why?
SQL> select * from v$version;
BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
PL/SQL Release 11.2.0.1.0 - Production
CORE 11.2.0.1.0 Production
TNS for 32-bit Windows: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
[code]....
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Dec 21, 2010
Which config file is used to change the os version(RHEL 4.0 to RHEL 5.5) by OS admin what will be its impact on ORACLE Databases.
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Nov 17, 2011
What is best practice to change small disk D:? I am beginner with Oracle. 10g on W2008. 5 datafiles (all indexes,second data file, 2 undotabs)*.dbf (34;30;1;34;12 GB) is on D:. Part of tablespaces (1 data, 1 undo)has files on c:.
I.
1.Shutdown 2008 server.
2.Copy D: image with GHOST to USB, network.
3.Connect new D, create RAID.
4.Restore image to D.
5.Start 2008 server.
II.
1.Stop application.
2.CONNECT AS SYSDBA
3.SHUTDOWN NORMAL or (IMMEDIATE)?
4.Copy files *.dbf at OS level from d: to ... USB disk, network.
5.Shutdown 2008 server.
6.Change disks, create RAID in BIOS.
7.Start W2008.
Is Oracle at this moment in SHUTDOWN mode?
8.Copy back *.dbf to new D: (with directory structure).
9.STARTUP Oracle.
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Aug 31, 2010
When I was going through the Enterprise Manager Grid Control, I found an error due to which I looked at the trace file and it said:
ORA-07445: exception encountered: core dump ACCESS_VIOLATION unable_to_trans_pc PC:0x7C81BD02 ADDR:0x49444E49 UNABLE_TO_READ]
I searched and found that it has something to do with the SGA parameters. I saw that the shared_pool_size and the sga_target paramters are set to 0...Also there are certain SQLs hanging at some point. I thought I should change the above mentioned parameters.
My question now is, can I use the Alter System statements from the SQL Plus to change these parameters, and do they change immediately or do I need to reboot the Oracle instance for those changes to take effect? I would like to do:
alter system set sga_target=400m;
alter system set shared_pool_size=200m;
would these work and take effect immediately?
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Aug 21, 2011
This facility has one last 10g database and a very problematic tablespace and last datafile associated with it. The tablespace was set up with INITIAL_ EXTENT of 131,072 (128K) instead of the more 'normal' 4,194,304 (4M) and NEXT_EXTENT of 262,144 (256K) instead of 4,194,304 (4M).
More worryingly, the datafile has INCREMENT_BY set to 1 (8K) instead of 1,280 (10M) or 2,048 (16M).Has anyone ever updated sys.ts$.dflinit and sys.ts$. dflincr to modify the INITIAL_EXTENT and NEXT_EXTENT, and sys.file$.inc to modify the INCREMENT_BY?
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Feb 26, 2013
1-how can i alter/change the size of tablespaces?.
2-is any changing in tablespace size will effect the over all performance?
Tablespace ; Size (MB); Free (MB); % Free; % Used
------------------------------;----------;----------;----------;----------
USERS ; 5; 4; 80; 20
SYSAUX ; 600; 140.875; 23; 77
UNDOTBS1 ; 640; 114.125; 18; 82
SYSTEM ; 700; 28.3125; 4; 96
TEMP ; 64; 0; 0; 100
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Feb 22, 2013
SQL> update t set a = 1 where b = 2; -- must have redo record
2 rows updated.
SQL> rollback;
the above redo record that uncommit changed must be written from redo buffer to the online redo logfile. why Oracle write the redo record that uncommit changed to the online redo logfile ? when it will be used?
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Nov 3, 2012
While renaming the datafile.
1) ALTER TABLESPACE .... OFFLINE;
2) CHANGING THE DATAFILE NAME IN OS LEVEL;
3) ALTER TABLESPACE .... RENAME DATAFILE 'FILE_OLD' TO 'FILE_NEW';
4) ALTER TABLESPACE .... ONLINE;
In the above steps, I HAD FORGOTTON TO FOLLOW THE 2ND STEP.
At the step of 3rd, i got error message, now i am not able to change the name in OS level Also.
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May 11, 2012
I want to change cursor_sharing, open_cursors and session_cached_cursors parameter values for SPFILE (Only SPFILE) using SQL Query.
I have found following SQL Queries, but I don't know these queries are only for SPFILE or not.
ALTER SESSION SET cursor_sharing='EXACT';
ALTER system set open_cursors=2500;
ALTER SESSION set session_cached_cursors=70;
I need SQL Queries only for SPFILE.
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Aug 15, 2013
How to change Character set for oracle 8i database. Is there anyway to change the Character set without affecting the current database.
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Jul 10, 2013
I am currently in the process of migrating our database from US7ASCII to AL32UTF8 using DMU.
I am stuck at a point where I have encrypted data that, when the conversion happens, will be destroyed. Oracle suggests to move the data which is currently stored in VARCHAR2 datatype, to a "character set safe way" like hex notation or base64 before converting.
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Mar 1, 2011
I want to change database character set from AL32UTF8 to WE8ISO8859P1.
what are the steps I need to follow without creating any new database with the character set as WE8ISO8859P1.
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Oct 24, 2012
I want to change space allocation for character columns in my database, So it will store them as 'CHAR' and not 'BYTE'.my character set is
SQL> SELECT VALUE FROM V$NLS_PARAMETERS WHERE PARAMETER='NLS_CHARACTERSET';
VALUE
----------------------------------------------------------------
AL32UTF8
SQL> alter system set NLS_LENGTH_SEMANTICS='CHAR' scope=both;
System altered.I bounced the instance just to make sure
System altered.
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
Connected to an idle instance.
SQL>
SQL>
SQL> startup
ORACLE instance started.
[code].....
And then I want to see that when I create a table with some varchar2 column,The space for it will be allocated by chars, and not by bytes! However, when I run a check of create table, this is what I get:
SQL> drop table check_char;
Table dropped.
SQL> create table check_char (some_name varchar2(10));
Table created.
SQL> select a.char_used
2 from all_tab_columns a
3 where table_name='CHECK_CHAR'
4 and a.owner='SYS';
C
-
B
SQL>
What is the reason for space allocation to remain in BYTES and not CHAR, or what else I can check?
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Jun 8, 2012
We have one primary oracle database 10.2 and standby by database with no data guard. Initially we have 2 redo log group in primary and standby database.
We have recently add 2 more redo log and increase the size of log member from 50m to 200m in primary database. We don't have any problem in primary database.but in standby database we face a problem because we cannot open it. It always in mount stage in which . How we change the size of current redo log because we can't run. Alter system switch logfile command in mount stage.
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Mar 12, 2010
Error is occurred during the transaction...i.e.
ORA-00607: Internal error occurred while making a change to a data block
ORA-00600: internal error code, arguments: [4194], [89], [83], [], [], [], [], []
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Nov 17, 2011
I have created two types and a list of the first type:
create type type1;
/
create type type1_list as table of ref type1;
/
create type type2;
/
I have now just created the two types as follows:
create type type1 as object(
id# number
);
/
create type type2 as object(
attribute1 type1_list,
MEMBER FUNCTION function1 RETURN NUMBER
);
/
Ok, I've created the tables (I don't know if it's necessary to point out my problem)
CREATE TABLE type1_table OF type1;
/
CREATE TABLE type2_table OF type2
NESTED TABLE attribute1 STORE AS nested_type1_list_table;
/
And what I wanted to do now is to implement the member function1 and check something of the attributes of type1 in the list of attribute1... And that's where my question occurs, how does it work, I can't figure it out. I tried something like this:
Quote:
create or replace
TYPE BODY type2 AS
MEMBER FUNCTION function1 RETURN NUMBER AS
[Code]....
But I don't get the right way, it doesn't work
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Jan 18, 2010
I wanted to export a table "emp_production" from Production database then import it as "emp_datawarehouse" in Data warehouse database.Both tables has same structure. I have granted IMPORT FULL DATABASE & EXPORT FULL DATABASE privileges to both schema
I tired with the following syntax
$ Expdp u1/p1@h1[/email] tables= emp_production directory=test dumpfile=test1.dmp
$ Impdp u1/p2@h2[/email] directory=test dumpfile=test1.dmp remap_schema=u1.emp_production:u2.emp_datawarehouse
remap_tablespace=Example1:Example2
But I am getting the following error
ORA-31631: privileges are required
ORA-39122: Unprivileged users may not perform REMAP_SCHEMA remapping.
Why this ? "emp_production" table has 150 million rows, every week importing this table then inserting into "emp_datawarehouse" table takes long time.
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