The second and terminal release of Oracle Corporations Oracle 11g database product. 11.2 was released for Linux on September 1st, 2009. New features added include RAC One Node, Improved data compression ratios (up to 20x), Edition Based Redefinition, Recursive Subquery Factoring, Instance Caging, ...

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1answer
34 views

most effective architecture to apply mulitple functions

I have a table that is the only source for a second table. Currently the second table is created using a CTAS (create table as select) statement that pulls in all the columns from the first table and ...
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2answers
1k views

oracle tablespace extending

While under massive write (insert and create table as) load, when Oracle RAC needs to extend tablespace, all write activity gets blocked for however long it takes it to finish extending (tens of ...
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1answer
28k views

Getting “ORA-00942: table or view does not exist” while table does exist

I'm fairly new to Oracle database. I have installed Oracle Database 11g R2 on Oracle Linux 6. I have successfully created a new database with dbca and connected to the database using: $ sqlplus "/ as ...
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1answer
2k views

oracle blocking sessions

I am trying to investigate some concurrency issues on Oracle 11 RAC. So far the most helpful tool I have is "blocking sessions" view of the Enterprise Manager, which tells me which query is blocking ...
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2answers
779 views

FileWatcher Troubleshooting Options

I have setup a Credential/Procedure/Program/File Watcher/Job to monitor a folder for new files, but it is not working. I am trying to figure out what I can check to troubleshoot why this isn't ...
4
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2answers
1k views

Compare two Oracle database roles

I'm trying to re-engineer my corporates user managament and want to compare all the roles with each other to find duplicate ones. Doing it by hand is really tiring and I need to compare like 150 ...
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2answers
4k views

Problem compiling view when it is referencing a table in an other view: insufficient privileges

Oracle 11g R2 Logged on: SYS / AS SYSDBA When I try to compile or create a view that is referencing local schema tables. It works fine. Problem does occur when I try to compile the same view ...
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2answers
89 views

CONNECT BY using 3 tables(2 DIM and 1 FACT to get the Level and dependencies)

Below is my scenario and any help in this regard would be highly appreciated. I need to get the list of Managers and reporting persons to that manager with LEVEL at ID level. But the Fact table ...
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1answer
455 views

Altering the location of Oracle-Suggested Backup

On one database, the Oracle-Suggested Backup scheduled from Enterprise Manager always ends up in the recovery area, despite RMAN configuration showing that device type disk format points elsewhere. ...
0
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1answer
297 views

Oracle cluster top activity class “cluster”

When under high load (many queries in parallel) our Oracle RAC gets in a state where most of the activity is reported as "cluster" by Enterprise Manager. It stays like that for 30 minutes to a couple ...
3
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2answers
832 views

How make convincing case to DBA to use Oracle external tables for 500 MB to 5 GB files?

In our data feeds, we have a stack of XML files as well as numerous flat files to put into an Oracle11g database. We flatten the XML into delimited files, and load the whole set using SQLLoader. I ...
0
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1answer
159 views

How would you track DB storage use and then extrapolate it?

I need to track the size of various DBs we have, then see it's growth rate so that we can guess where it will be at certain times. I'm using Oracle 11g first, but will eventually be applying this to ...
4
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1answer
2k views

How to determine Oracle LOB storage footprint?

With SECUREFILE storage I can specify whether I want compression (and the level of it) and deduplication, and it's all a trade-off between time and space. Timing is fairly easy to profile but what's ...
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2answers
826 views

Need to install Oracle Express 11g Release 2 on a Windows 7 64-bit laptop

I need the Oracle 11g Release 2 sample schemas (HR, OE, etc.) in order to do most of the available online tutorials. I was hoping to install Oracle Express Edition on my Windows 7 laptop to get ...
4
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2answers
719 views

Multiple JOIN of 6 tables via 5 database instances

I'm currently reengineering my corporates user management and created a table which lists all users of all the 5 database instances. Next step is, that I need to write a query which shows me all the ...
0
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1answer
41k views

Where I can find the tnsnames.ora file for my Oracle Windows client? [duplicate]

I installed Oracle client for my Windows 7 machine. I can connect to a remote Oracle database using Toad for Oracle using the direct method (giving host, port and service name for the connection). ...
2
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2answers
9k views

Dynamic Oracle Pivot_In_Clause

I'm kinda stuck. I want to do a user-role-relationship pivot table and my query so far looks like this: WITH PIVOT_DATA AS ( SELECT * FROM ( SELECT USERNAME, GRANTED_ROLE ...
1
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1answer
377 views

How to keep an Oracle 11g instance lean?

As a Mac user I run a local Oracle Enterprise Linux (OEL) Developer Day VM that houses an Oracle 11g instance for development/unit testing. I frequently refresh the data in the schemas (sometimes ...
1
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1answer
5k views

Why Oracle SQL Developer does not need Oracle client?

I installed Oracle SQL Developer from Oracle's web page. It seems to work without a Oracle client installed on my computer. How is that possible? I also installed Toad for Oracle and it seems to ...
0
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1answer
541 views

Can we create a table in specific datafile - Oracle 11g R2?

I am buying a new server than has two HDs: 300 GB with 15000 rpm. 600 GB with 10000 rpm. I am thinking to allocate the datafiles in both hard disks. and put the less used tables in the data files ...
0
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0answers
665 views

Is it recommended to run a Oracle schema backup when there are active sessions?

I need to backup two schemas in a Production database (Oracle11gR2) that are being accessed by an application and some other systems. These schemas are quite small and exp will be used for the export. ...
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0answers
144 views

Replicating Excel's CHIDIST function in Oracle 11g

I'm attempting to replicate the functionality of an Excel workbook in Oracle. One of the formulae on the worksheet uses CHIDIST, which "Returns the one-tailed probability of the chi-squared ...
2
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1answer
496 views

Rebuild an index while it is being referenced in Oracle

I have come across many articles on this site and on Tom Kyte's blog on the how, whys and whens of Re-building indexes. Note that this question is about whether I can rebuild when there are concurrent ...
3
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1answer
5k views

How to combine `delete` and `insert` operations in one statement?

for the following data, I'd like to be able to delete some rows and insert others giving the result below. Is this possible with a single statement (eg with the merge statement)? create table ...
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0answers
445 views

rman 'delete archivelog all’ very slow

On our automated test system we use flashback all the time to reset our Oracle 11g database to a state before a test run. We noticed some of the scripts involved, started to become slower and slower. ...
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1answer
7k views

Using wm_concat to concatenate rows, but in an order determined by another column

Let's say I have 3 columns: p_id, description, order_by. I am trying to do the following: I would like to concatenate the description for all like p_id values. So we are talking a group by p_id ...
3
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1answer
890 views

Index on foreign key makes query extremely slow

We are recently experiencing a tremendous query slowdown with spilled over temp tablespace. A specific query causes this problem. The queried table (table3) has an indexed PK, three FK with indexes ...
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2answers
61 views

Why is the padding on months in Oracle 9 characters?

I ran two simple sql statements select length(to_char(sysdate, 'fmMonth')) from dual; select length(to_char(sysdate, 'Month')) from dual; The length of the first statement was 4 (It's June) and the ...
1
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1answer
394 views

USER_ID field in alert logs (also in V$DIAG_ALERT_EXT view)

Does anyone know what triggers the USER_ID field in the log.xml to be populated? The value also exists in the V$DIAG_ALERT_EXT view. I've found by observing the logs that if a temp tablespace fills ...
0
votes
1answer
2k views

Different dates Oracle 11g with TOAD

I have the following queries: SELECT to_date(to_char(to_date('01-FEB-1949'))) FROM DUAL; /*this returns 2/1/2049. */ SELECT to_date(to_char(to_date('01-FEB-1949'),'dd-MON-yyyy')) FROM DUAL; ...
1
vote
1answer
3k views

Unable to connect to Amazon RDS instance [closed]

I recently created an oracle instance on Amazon RDS. Unfortunately, I'm not able to connect to the instance using Oracle SQL Developer. The (relevant) information I have from Amazon; Endpoint - The ...
2
votes
1answer
391 views

BLOBs storage in a dedicated table

I have a database that has several BLOB columns scattered across multiple tables. Since I am a developer and am looking at making application code writing easier, I wanted to turn these columns into ...
2
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1answer
3k views

where is oracle session timezone set?

I have a logging table CREATE TABLE EMAIL_LOGGING ( ID NUMBER(9) NOT NULL, SEND_DATE TIMESTAMP(6) DEFAULT LOCALTIMESTAMP NOT NULL, ...
2
votes
3answers
3k views

How to automate Oracle DB installation (like a 'hands-free' install)?

I installed the Oracle 11g2 'standard' edition using the following zip-files: linux.x64_11gR2_database_1of2.zip linux.x64_11gR2_database_2of2.zip I used the installation guide by Oracle which I ...
3
votes
2answers
12k views

How to quickly startup/shutdown Oracle 11?

I am wondering what is the quickest way to properly startup/shutdown a Oracle DB daemon (Oracle 11.2, installed on a test machine). I need it for C/C++ programs that use the OCI/Pro*C API. Currently ...
0
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0answers
2k views

Oracle 11gR2 DBCA installation failing with TNS Lost contact

I am getting below errors while running DBCA with silent install using response file ORA-12547: TNS:lost contact PRCR-1079 : Failed to start resource ora.ocl.db It's a fresh installation and not ...
0
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1answer
84 views

Creating oracle database physical files from migrated DB

I migrated a database from SQL Server to Oracle 11g and there doesn't seem to be any physical files created after migration. The client requires that they receive a copy of the database so they can ...
1
vote
1answer
700 views

Oracle 11g install on Debian Wheezy does not start

I successfully installed Oracle 11g R2 on my laptop for evaluation, by mixing various sources of documentation. I saw the Oracle daemons after installation. But I have a few problems : After a ...
2
votes
1answer
3k views

Data Migration from Oracle to SQL Server [duplicate]

If you need to do a data migration from an Oracle database to SQL server, what approaches and technical solutions are the best practice? Our database has about 100 million rows and a total of 52 ...
6
votes
1answer
401 views

Sudden increase in log_file_sync waits

I'm on Oracle 11gR2 with a 2 node RAC system. It's shared fiber storage to an EMC Clariion. Last friday things went bad..fast. All of the sudden processes that normally ran fine for years became ...
1
vote
0answers
235 views

Performance Hit when upgrading to Oracle 11gr2

I am experiencing the same symptoms as noted in this question which was closed and does not have a satisfactory answer. Original Question We've recently upgraded from Oracle 10gR2 (10.2.0.4 ) to ...
0
votes
1answer
610 views

Enable Oracle Database options in an existing database

I want to enable Oracle Real Application Testing option in my existing database, but I couldn't find the way to do that using Oracle Universal Installer (OUI) or Database Configuration Assistant ...
0
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0answers
519 views

How to clone a database from one environment to a database on another environment?

OS: RHEL DB: Oracle 11g version 11.1.0.7.0 I am trying to clone a database on one environment (environment A) to another database on a separate environment (Environment B). Environment B's database ...
4
votes
2answers
5k views

How to remove all hidden parameters from Oracle Database

How do I remove all hidden parameters from Oracle Database before upgrading? I'm using the SQL query below. So what do you recommended? SELECT name,description from SYS.V$PARAMETER WHERE name LIKE ...
2
votes
1answer
163 views

What's the most appropriate NLS_SORT parameter to cover all/most European languages?

I'm developing an Oracle 11g-based application which is likely to be used by clients in many different countries (mostly European). I want the program to change its NLS_SORT so that it's case ...
3
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1answer
646 views

How do I identify the remote db agent name to use in create_database_destination on Oracle 11gR2?

I am trying to setup DBMS_SCHEDULER in Oracle 11g to run a remote database job. I have a remote Oracle 11g R2 database on unix and a local one on Windows. I read that you can install the oracle ...
0
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1answer
3k views

User with dba privs can't login to APEX, but can from SQL*Plus

I'm using Oracle 11gR2 XE. A user with dba privileges can't log in to the APEX interface, but can from the command line with sqlplus. I just created user: CREATE ROLE administrators; GRANT dba TO ...
0
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0answers
388 views

Duplication Oracle Database to remote host

I have two scenarios. 1 ) Let's say , I have the same file system and same SID on both nodes. I've created any directories necessary for start the duplicate database. First I used command below. ...
2
votes
2answers
591 views

Duplicating a Database with RMAN

I would like to duplicate to the same server Oracle Database with RMAN. I've configured flash recovery area for Oracle Database. My database is using SPFILE as shown below. SQL> SELECT ...
1
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1answer
2k views

NLS_TIMESTAMP_FORMAT changing automatically and randomlly

I am using Oracle 11gR2. My nls_timestamp_format is changing randomly from dd-mon-rr to yyyy/mm/dd. Does anyone have any clue why this is happening?