Statistics: Oracle's definition of "density" and "skew"

Curious if anyone knows exactly how Oracle defines "density". One analyst pointed us towards Note 43041.1 "QTUNE: What is Density?", but I cannot find it. Also looking for the calculation of "skew" (as in the method_opt => for all columns size skewonly). I found statistical formulas invovling sums of squares and "third mode", etc, but nothing that told me exactly how Oracle arrives at this measure.
DB is OSEE 10.2.0.2.
Thanks,

FYI - I was officially pointed to these Metalink Notes:
43041.1 "QTUNE: What is Density" (limitted publication)
72539.1 "Interpreting Histogram Information"
The references for these note points to some very interesting reads as well.

Similar Messages

Oracle performance, slow for larger and more complex results.

Hello Oracle forum,
At the moment i have a Oracle database running and i'm specifically interested in the efficiency spatial extension for webmaps and GIS.
I've been testing the database with large shape files (400mb - 1gigabyte) loaded them into the database with shp2sdo->sql*loader.
Using Benchmark factory i've test the speed of transactions an these drop relatively quickly. I've started with a simple query:
SELECT id FROM map WHERE id = 3 when I increase the amount of id's to 3-10000 the performance decreases drastically.
so :
SELECT id FROM map WHERE id >=3 and id <= 10000
The explain plan shows the second query , both query's use the index.
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 9828 | 49140 | 22 (0)| 00:00:01 |
|* 1 | INDEX RANGE SCAN| SYS_C009650 | 9828 | 49140 | 22 (0)| 00:00:01 |
Statistics
0 recursive calls
0 db block gets
675 consistent gets
0 physical reads
0 redo size
134248 bytes sent via SQL*Net to client
7599 bytes received via SQL*Net from client
655 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
9796 rows processed
The statistics does not show very weird stuff, but maybe i'm wrong. Nothing changed in the explain plan except for the range scan instead of a unique scan.
The query returns lots of results and this is I think the reason why my measured time of the query is large. The time it takes returning large amount of rows increases quickly for more rows.
. Can this be solved? The table has been analyzed before starting the query.
The parameters of the database are not really changed from standard, I increased the amount of memory used by Oracle 11g to 1+ gigabyte.
and let the database itself decide how it uses this memory.
The system specs are and db_parameters are:
Oracle 11G
Memory Processor # of CPUs OS OS Version OS B
1.99 gb Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz 2 Microsoft WindowsXP 5.2600
0=Oracle decides which value will be given
cursor_sharing EXACT
cursor_space_for_time FALSE
db_block_size 8192
db_recovery_file_dest_size 2147483648
diagnostic_dest C:\DBBENCHMARK\ORACLE
dispatchers (PROTOCOL=TCP) (SERVICE=gistestXDB)
hash_area_size 131072
log_buffer 5656576
memory_max_target 1115684864
memory_target 1048576000
open_cursors 300
parallel_max_servers 20
pga_aggregate_target 0
processes 150
resumable_timeout 2162688
sort_area_size 65536
Sga=632mb
PGA=368mb
javapool=16mb
largepool=8mb
other=8mb
So I indexed and analyzed the data what did i forget? I can speed it up with soft parsing, but the problem remains . Hopefully this enough information for some analysis, does anyone experienced the same problems ? I tested with SQLdeveloper the speed and is shows the same speed as Benchmark factory. What could be wrong with the parameters?
Thanks,
Jan Martijn
Edited by: user12227964 on 25-jan-2010 4:53
Edited by: user12227964 on 26-jan-2010 2:20

Sand wrote:
select count(id) , resulted in 3669015 counted id's.
The database counted 18,345,075 rows per second without binded variables , which is ten times slower as your result. This can be possible because of hardware but my question is specifically about the number of rows returned thus large amount of results. The idea was not to compare the speed of "+select count(*)+" statements - but to illustrate that even when dealing with a huge number of rows, one can decrease the amount of I/O that needs to be performed to deal with that number of rows.
Select id from map where id <= 1
4000 rows per second are selected, Rows/sec is a meaningless measurement - due to physical I/O (PIO) versus logical I/O (LIO). You can select a 100 rows and these require PIO. Resulting in an elapsed time of 1 sec. You can select a 1000 rows that require only LIO. With an an elapsed time of 0.5 sec.
Is the 2nd method better or faster? No. It simply needed less time to be spend on I/O as the data blocks were in the buffer cache (memory) and did not require very slow and expensive disk access.
Another database i testes returns 6 times 25425 rows back per second for the same query (100 ids). What could be a parameter that limits the output speed of multiple rows in a query?.Every single row that needs to be read/processed by a SQL statement has a cost associated with it. This cost is not consistent! It differs depending on how that row can reached - what I/O paths are available to find that rows? Does the full table need to be scanned? Does an index need to be scanned? Is there a unique index that can be used? Is the table partitioned and can partitioning pruning be applied and local partition indexes used? Are there are user functions that need to be applied to the row's data? Etc. Etc.
All these together determine how fast the client gets a row from the cursor executing that SQL.
The more rows you want to process, the bigger the increase in the cost/expense - specifically more I/O. As I/O is the biggest expense (slowest ito elapsed time).
So you want to do as little I/O as possible and read as little data as possible. For example, instead of a full table scan, a fast full index scan. For example, instead of reading the complete contents of a 10GB table, reading the complete contents of a 12MB index for that table.
I suggest that you read the Oracle Performance Guide to familiarise yourself with basic performance concepts. Use http://tahiti.oracle.com for finding the the guide for your applicable Oracle version.

Definitions of record and table type

Im confused with the definition of record and table type. Below is my understanding, Please correct me if anything wrong. Thanks in advance!
Record type can only hold one record with multiple fields.
Table type is an array (multiple records) with only one field
Table type defined with %rowtype (table of records) is an array of multiple records with multiple fields.

I am not sure that I understand what you are asking. I have not heard the term table type before.
However, I think a record type is more closely aligned to the %rowtype declaration. Maybe a collection is what you are looking for with the term table type.
From the Oracle 10g documentation:
%ROWTYPE
In PL/SQL, records are used to group data. A record consists of a number of related fields in which data values can be stored. The %ROWTYPE attribute provides a record type that represents a row in a table. The record can store an entire row of data selected from the table or fetched from a cursor or cursor variable.
Columns in a row and corresponding fields in a record have the same names and datatypes. In the example below, you declare a record named dept_rec. Its fields have the same names and datatypes as the columns in the dept table.
DECLARE
dept_rec dept%ROWTYPE; -- declare record variable

Oracle EBusiness suite professions tasks and duties

Hello everybody
I inquire about something regarding Oracle EBusiness suite professions tasks and duties. I've tasked by my manager with writing a report lists the main tasks and key responsibilities for each of the following technical professions within Oracle E Business Environment:
1)-Apps DBA.
2)-Apps Technical Consultant (Apps Developer)
3)-Apps Business Consultant.
I've contacted Oracle Support recently via opening SR .But, They informed me that they don’t provide such information and therefore, they suggest me weather to contact Oracle Consulting to post here.
I would appreciate your help.
Sami

I don't see how you'd be able to integrate OAM with EBS unless you have the oSSO (assuming of course that you're not on the bleeding edge, per 975182.1).
We are running the same configuration and have setup the redirects in OAM policy. We setup specific context roots for each application, then use OAM policy to redirect. (for example, http://iwa-server/ebs redirects to https://ebs-server)
Unique authorization rule for each redirect, then a unique "policy" on the "Policies" tab for each redirect. Each Policy maps to the respective Authorization Rule.

Whats the difference between high-density and low-density ram?

I bought what I thought was supposed to be a cheap 256 mb chip (pc100 or 133) but the g4 400 read only 128mb, The fellow in the store that sold it flipped out when I told him I had a Mac and said something about high density and low-density.Another guy in the store described it as being one sided and two sided.
I don't know what my machine needs. I got my money back but he would'nt let me exchange the chip for another, me thinking it was simply mislabeled.

The QuickSilvers use PC-133 SDRAM and are compatible with high-density memory chips (256 Megabit), so that 16-chip 512 MB and 8-chip 256 MB non-ECC DIMMs are supported. A low density, 16-chip (128 Megabit) 256 MB DIMM is also supported.

C# compiling error: 'System.Array' does not contain a definition for 'Select' and no extension method 'Select' accepting a first argument of type 'System.Array' could be found (are you missing a using directive or an assembly reference?)

Hello experts,
I'm totally new to C#. I'm trying to modify existing code to automatically rename a file if exists. I found a solution online as follows:
string[] allFiles = Directory.GetFiles(folderPath).Select(filename => Path.GetFileNameWithoutExtension(filename)).ToArray();
string tempFileName = fileName;
int count = 1;
while (allFiles.Contains(tempFileName ))
tempFileName = String.Format("{0} ({1})", fileName, count++);
output = Path.Combine(folderPath, tempFileName );
string fullPath=output + ".xml";
However, it gives the following compilation errors
for the Select and Contain methods respectively.:
'System.Array' does not contain a definition for 'Select' and no extension method 'Select' accepting a first argument of type 'System.Array' could be found
(are you missing a using directive or an assembly reference?)
'System.Array' does not contain a definition for 'Contains' and no extension method 'Contains' accepting a first argument of type 'System.Array' could be
found (are you missing a using directive or an assembly reference?)
I googled on these errors, and people suggested to add using System.Linq;
I did, but the errors persist.
Any help and information is greatly appreciated.
P. S. Here are the using clauses I have:
using System;
using System.Data;
using System.Windows.Forms;
using System.IO;
using System.Collections.Generic;
using System.Text;
using System.Linq;

Besides your issue with System.Core, you also have a problem with the logic of our code, particularly your variables. It is confusing what your variables represent. You have an infinite loop, so the last section of code is never reached. Take a look
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
namespace consAppFileManipulation
class Program
static void Main(string[] args)
string fullPath = @"c:\temp\trace.log";
string folderPath = @"c:\temp\";
string fileName = "trace.log";
string output = "";
string fileNameOnly = Path.GetFileNameWithoutExtension(fullPath);
string extension = Path.GetExtension(fullPath);
string path = Path.GetDirectoryName(fullPath);
string newFullPath = fullPath;
string[] allFiles = Directory.GetFiles(folderPath).Select(filename => Path.GetFileNameWithoutExtension(filename)).ToArray();
string tempFileName = fileName;
int count = 1;
//THIS IS AN INFINITE LOOP
while (allFiles.Contains(fileNameOnly))
tempFileName = String.Format("{0} ({1})", fileName, count++);
//THIS CODE IS NEVER REACHED
output = Path.Combine(folderPath, tempFileName);
fullPath = output + ".xml";
//string fullPath = output + ".xml";
UML, then code

Is it possible to boot oracle vm server over iSCSI and ipxe?

Hi,
Is it possible to boot oracle vm server over iSCSI and ipxe?
I have tried it, but got a kernel panic after the boot progress.
Can anyone tell me what should I do to install and or boot oracle vm server on and from a iscsi lun instead a local hard drive?
Thanks!
Redwan

959211 wrote:
Hi,
I have Windows 2008 R2 64 Bit Operating Server Installed.
Other software that are Installed :
1) Visual Studio 2010 Ultimate 32 Bit.
2) Microsoft SharePoint server 2010 64 Bit.
For my development purpose I want to install both oracle 11g client 32 bit and oracle 11g client 64 on the same machine.
Is it possible to install both 32 and 64 bit instance on the same machine.
Thanks
Sambityes, possible; but minor challenge to manage dynamically
how to ensure that you actually use the flavor you desire?

Can i use "Oracle Database 12c: Performance Management and Tuning " training for getting certification on "Oracle Database 11g: Performance Tuning 1Z0-054"

i have taken "Oracle Database 12c: Performance Management and Tuning new" training from oracle university. Now i would like to get certified on "Oracle Database 11g: Performance Tuning 1Z0-054" exam. Is it possible ?

I essentially endorse and refer you to Matthews' and John's post above.
I would differ with slightly with Matthew because my guess is you would often be able to use like for like 12c training for an 11g certification ( I believe there are precedents). BEFORE ANYONE ASKS THE OTHER WAY DOESN'T HAPPEN.
.... but totally concur with Matthew you would ill advised to procede on that basis without one of:
- This being advertised as possible on the website : e.g. https://education.oracle.com/pls/web_prod-plq-dad/db_pages.getpage?page_id=654&get_params=p_id:169 ... option 2 show courses.
- Confirmation from Brandye
- Confirmation from an Oracle Certification Support Web Ticket ( http://education.oracle.com/pls/eval-eddap-dcd/OU_SUPPORT_OCP.home?p_source=OCP )
... The more common (and in my opinion usually better) way would be get your 11g DBA OCP ( or higher first) and then take the 1z0-054. I am almost certain they will accept your 12c course for the 11g DBA OCP.
If you are choosing the route of not being a 11g (or 12c ) DBA OCP first but are on option 2 and relying on the course for certification then the issue is more in the balance and you are even more strongly advised to get confirmation before proceding (remember if the rules need to be changed for you only then any profit out of the exam is lost).
In general my understanding is Oracle would prefer to encourage people to train on the latest version of product that is available for training and will prefer to avoid restrictions which would cause you to train at a lower version. ( This is simply my guess at Oracle University Policy ... personal opinion only).
Having said all I have said I'd encourage you to go with the advice of the earlier two posts.

Oracle EBS 12.1.3 and SOA 10g hardware sizing

Hi All,
To give you the background, we have integration requirements where in one of the interface about 20000 sales orders come in the system everyday and they have about 3-5 lines per sales order. Most of these orders come between 3-6 PM. We have 50 other interfaces along with this but this is a major one. Client is concerned about performance and so we have to give right design and right hardware sizing so that the system is able to handle all the load without causing performance issues. We are planing to use Oracle EBS 12.1.3 and SOA Suite 10.1.3.5 (10g)
Any processes, documentation on how to go about hardware sizing, tools will be helpful
Thanks,
Rahul

Any Updates??

Oracle Application Server 10g Forms and Reports Services

Hi there,
I want to install Oracle Application Server 10g Forms and Reports Services. What must I download? The installation guide says that "Oracle Application Server 10g (9.0.4) Forms and Reports Services allows you to install and configure Forms and Reports Services without the need to install and configure all of Oracle Application Server 10g (9.0.4)" but it does not clearly state what exactly to download.
Oracle Application Server 10g Release 2 (10.1.2.0.2)
[http://www.oracle.com/technology/software/products/ias/htdocs/101202.html]
or
Oracle Developer Suite 10g (10.1.2.0.2)
[http://www.oracle.com/technology/software/products/ids/htdocs/101202winsoft.html]
Faoilean.

You might find better assistance in the APplication Server forum - Oracle Application Server - General

Oracle Workflow Manager, Agent Listener, and Java Mailer problem

Hi,
I am not sure this topic to this forum, since this might be installation issue.
But I am hitting a big wall.
I had Windows 2000 SP4.
I have already installed Oracle Database 10gR1, Oracle Developer 10gR2, and Oracle Workflow 2.6.3 Standalone previously.
Including :
- Oracle Workflow Server 2.6.3
- Oracle Workflow Builder 2.6.3.5
- Apache HTTP Server 9.0.4
- Workflow Middle Tier
Anything seems to right, including the Notification Mailer and the Business Event.
And I had also made backup of them surely.
Now,
I'd like to change into Oracle Database 10gR2 because :
1. Some errors I found when I tried to call a Report from Oracle Form.
Unable to connect to Report Server ...
I thought Oracle Database 10gR1 is not suitable for Oracle Developer 10gR2.
2. And in the OWF 2.6.3 Workflow Home Page, there was no Logout button (which I found in OWF 2.6.4)
I removed my previous installation including Oracle Workflow.
After strugglineg in the installation of Oracle Database 10gR2, now I am facing another problem with Oracle Workflow.
I succesfully installed Oracle Workflow 2.6.4 Server and Oracle Workflow Manager (standalone version),
and the Oracle Workflow Middle Tier.
After I launch Oracle Workflow Configuration Assisstant, everthing seems to be normal.
I succed to open the Oracle Workflow Home Page (and found the Logout button there)
Next, I tried to navigate to the Oracle Workflow Manager.
1. I start the OC4J_Workflow_Management_Container --> initialized
2. OC4J_Workflow_Component_Container
The following error line appeared in the OC4J command prompt
06/05/26 10:31:40 LOG_ID_UNKNOWN : oracle.apps.fnd.cp.gsc.Logger.Logger(String,
int) : Logging to System.out until necessary parameters are retrieved for Logger
to be properly started.
06/05/26 10:31:40 LOG_ID_UNKNOWN : oracle.apps.fnd.cp.gsc.SvcComponentContainer.
initializeStateMachine() : BEGIN [default implementation]
06/05/26 10:31:40 LOG_ID_UNKNOWN : oracle.apps.fnd.cp.gsc.SvcComponentContainer.
getNewWorkflowContext() : BEGIN
06/05/26 10:31:45 LOG_ID_UNKNOWN : oracle.apps.fnd.cp.gsc.SvcComponentContainer.
loadGlobalParameters() : BEGIN
06/05/26 10:31:48 oracle.apps.fnd.wf.common.ContextFactoryException: Unable to g
et connection from data source because the following Exception occurred -> java.
sql.SQLException: ORA-28000: the account is locked
06/05/26 10:33:57 Oracle Application Server Containers for J2EE 10g (9.0.4.1.0)
initialized
3. finally it initialized
Next I tried to go to Oracle Workflow Manager from related link of Enterprise Manager
It is said that the OWF_MGR is locked
(I surprised since I had UNLOCKED the OWF_MGR after the installation and succeed to login at the Workflow Home Page)
And the following error line appeared in the commaned prompt after that
06/05/26 10:35:03 OrionCMTConnection not closed, check your code!
06/05/26 10:35:03 Logical connection not closed, check your code!
06/05/26 10:35:03 (Use -Djdbc.connection.debug=true to find out where the leaked
connection was created)
4. I re-UNLOCK the OWF_MGR and login to Oracle Workflow Manager
I noticed that the Agent Listener and Notification Service is Unavailable
(In OWF 2.6.3, The Agent Listener was started and Notification Service was waiting to be configured)
I tried to start one of the Agent Listener, but the following error appeared
ERROR: The Service Component Container is not running
Well, I had the same problem when installing the OWF 2.6.3
I tried to uninstall (remove) and re-install it like I had done before in OWF 2.6.3
(based on someone's post in Oracle's forum)
But this time, the re-installation won't fix this problem. (It was succeed in the OWF 2.6.3)
Everytime I start the OC4J, using wfmgrstart.bat and wfsvcstart.bat
the OWF_MGR is re-LOCKED(TIME) automatically.
And the servlet (WFALSNRSVC and WFMLRSVC) are not running.
I am worry, since I cannot use the Notification Mailer if this problem had not fixed yet.
(In OWF 2.6.3, the mailer was not available until those servlet is Started)
Sorry for the long post.
Any help would be grateful.
Many thanks,
Buntoro

Hi,
Finally, I have found the solution.
Step :
1. Start all of the Oracle Service, except for the OC4J
If you have already started OC4J, then stop them
Unlocked the <wf_manager_user>
2. Search in your Oracle Home : data-sources.xml
There should be two files,
one is in the ...\OC4J_Workflow_Component_Container\application-deployments\WFALSNRSVCApp
the other is in ...\OC4J_Workflow_Component_Container\application-deployments\WFMLRSVCApp
3. Make sure, you create back up of them.
4. Replace the following line
password="->pwForOwfMgr"
with
password="<your_wf_manager_password>",
should be look like this
password="a"
5. Now start the OC4J using wfmgrstart.bat and wfsvcstart.bat
6. Next, login to the Oracle Workflow Manager
This worked for me.
Hope this will help someone who has the same problem.
Buntoro

Oracle Open World in SanFrancisco and Oracle Spatial

Hi,
This week is Oracle Open World in San Francisco, and while usually we try to keep this message board strictly technical, I wanted to mention that there are some interesting things happening here.
There are a few sessions Wednesday in Room 2016 starting at 3:00 pm:
Data Management on a Budget with Oracle 10g: Exploring Strategies and Tactics with the U.S. Geological Survey
by Nate Booth and Harold House, USGS
Oracle Database 10g Spatial Performance and Manageability Best Practices and German Rail Case Study
by Dan Abugov (me) and Andreas Hoefler, Fichtner Consulting & IT AG
I'm excited to be talking about Partitioning Best Practices, and we'll be posting the white paper here on OTN.
Finally, please come and see us at booth E28 in the Oracle DemoGrounds (we have Locator/Spatial, MapViewer, and Workspace Manager here in the pod). If you are the FIRST person to mention reading this posting on OTN when you visit the booth, we'll be happy to give you a copy of "Pro Oracle Spatial", the first book devoted to developing applications using Oracle Spatial. The book was written by Ravi Kothuri, Albert Godfrind (two Oracle Spatial Developers) and Euro Beinat of Geodan NL. One of the authors (Albert Godfrind) is here, and if you ask I'd bet he'd autograph it for you!
We also have a very limited supply of the book we'll be giving out over the course of the conference.
Of course, everyone who stops by will get the Oracle Spatial mini CD which includes viewlets, white papers, and more.
The book is also available here:
http://www.amazon.com/exec/obidos/tg/detail/-/1590593839/qid=1102358585/sr=1-1/ref=sr_1_1/002-9450919-8639226?v=glance&s=books

Hello,
Take a look at this page, http://www.oracle.com/technology/events/oracle-openworld-2007/index.html
There are links here to the whole OOW (social network,twitter,blog/flicker)osphere I think the new buzzword being "Social Graph" that covers all that.
But anyway there are tons of ways for people to sign up and track the sessions and see who's going to go where, etc.
Regards,
Carl
blog : http://carlback.blogspot.com/
apex examples : http://apex.oracle.com/pls/otn/f?p=11933:5

Oracle 11g R2, CREATE TABLE and QUOTAS

Hello everyone,
I need some insight about a strange behavior I found out in Oracle 11gR2. Don't know if I do miss something or if I just found out a security issue with Oracle.
Oracle Version : 11.2.0.1.0
The problem is related with the CREATE TABLE privilege and the QUOTA on specific tablespace.
Please, try this on your systems (if you have some spare time and care to confirm the "bug").
Create a user, grant only two privileges, CREATE SESSION and CREATE TABLE.
Grant NO quota on any tablespace.
Try to create table on any tablespace (except SYSTEM) and tell everyone if it worked or not.
The oracle documentation states the following :
To create a relational table in your own schema, you must have the CREATE TABLE system privilege. To create a table in another user's schema, you must have the CREATE ANY TABLE system privilege. Also, the owner of the schema to contain the table must have either space quota on the tablespace to contain the table or the UNLIMITED TABLESPACE system privilege.
[http://download.oracle.com/docs/cd/E11882_01/server.112/e17118/statements_7002.htm#SQLRF01402]
The fact is, so far, on two different instances of Oracle 11gR2, my users are not limited in creating tables only where they have quotas but wherever they want except SYSTEM.
The correct behavior would be to deny the table creation on tablespace where there is no quota but it does not.
My instance of Oracle 10g are behaving correctly and thus the table creation is denied on tablespace with no quota.
P.S1 Sorry if this a well known "bug/problem/issue". I've been ridicule on a well known forum for asking the same question. I am in no need to be "spoon filled" as stated on that famous website! I have read the documentation! I have googled a lot!
P.S2 Even though the table creation work on tablespace with no quota, you still can't insert data in it. So, big picture, the user can't filled the tablespace with irrelevant data but he can creates thousand of tables...!
Do I miss something?
Is there any "default" option I have to flag to prevent table creation where it should not?
?(?)

Hi. I'm planning on taking my OCP exam. If the exam ask a question realted to this topic, what is the correct answer?
create user barry identified barry
grant create session, create table to barry
1) barry cannot create a table since he has no quota
2) barry can create a table
According to the oracle document, the barry needs quota on the tablespace to create a table. however, according to the link you provided, in 11gR2, barry does not need quota to create a table. He only needs a quota to insert data.

Impdp ORA-02421 on Oracle 10.2.0.1 and 10.2.0.2

Hello,
The impdp utility crashes the import process with ORA-02421 for a schema which starts with a number on both Oracle RDBMS versions : Oracle 10.2.0.1 and 10.2.0.2.
I tried to apply patch 4671082 to Oracle 10.2.0.1 but it doesn't work and its a known issue.
Eg.
Processing object type SCHEMA_EXPORT/PROCEDURE/PROCEDURE
ORA-39126: Worker unexpected fatal error in KUPW$WORKER.PUT_DDL [PROCEDURE:"[b]233"."ADD_JOB_HISTORY"]
ORA-02421: missing or invalid schema authorization identifier
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 95
ORA-06512: at "SYS.KUPW$WORKER", line 6273
----- PL/SQL Call Stack -----
I need to migrate 1400 schemas (with passwords and all objects) witch starts with a number and I cant rename them.
Is there a workarround to do this staff.
Thank you
Best regards,
Max

. Is this version of the database, this method works?yes as long as USER owns table EMPLOYEES

Diffrence in running oracle on 32 bit OS and 64 bit OS ?

Hi ,
I am new to oracle , i would like to know what's the diffrence running oracle under 32 bit OS and 64 bit OS

i would like to know what's the diffrence running oracle under 32 bit OS and 64 bit OSWhat type of differences are you looking for? Basic one being you run 32 bit version of Oracle under 32 bit OS and 64 bit version under 64 bit OS.
Other being the availability of addressable memory in 32 and 64 bit versions (but that is more of an hardware level issue).

Statistics: Oracle's definition of "density" and "skew"

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