Oracle Database 11g Release 2. Please also tag oracle for search purposes.

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6
votes
4answers
1k views

Does an IOT guarantee order in a select?

We need to add a priority column to a table that gets hit about 250 times a second, approx 170 selects, 125 inserts and 60 updates. The column will be a simple number(1). The priority does not matter ...
22
votes
8answers
21k views

How do you version your Oracle database changes?

I am interested to know what methods other people are using to keep track of changes made to the database including table definition changes, new objects, packages changes, etc. Do you use flat files ...
3
votes
3answers
5k views

How can I select rows from a hierarchical query with the lowest level?

I have a hierarchical query in Oracle 11gR2 that returns something like this: Parent (Level 1) Child (Level 2) Grandchild (Level 3) Child (Level 2) Grandchild (Level 3) Grandchild (Level 3) ...
1
vote
1answer
308 views

How do I import data into oracle 11g r2 using a `.dmp` file and a `.par` file?

How do I import data into a new installation of oracle 11g r2 using a .dmp file and a .par file? Here is what I have done so far, on a Windows 8.1 devbox: 1.) Open command line as administrator 2.)...
26
votes
3answers
44k views

What is the difference between sys and system accounts in Oracle databases?

There are two ways to connect to Oracle as a administrator using sqlplus: sqlplus sys as sysdba sqlplus system/manager These accounts should be uses for different purposes, I suppose. Which tasks ...
6
votes
2answers
11k views

Learning to Optimize SQL Queries and Understand Execution Plans - Resources?

I find myself writing more and more SQL queries at work (mostly Oracle 11g, but some SQL Server 2005-2008) and have started creating some pretty complex views for the rest of the analyst team. They ...
8
votes
1answer
34k views

Importing schema to new or different tablespace

Is there a convenient way to import a schema into Oracle 11gR2 using a single new or different tablespace than where the data originated? As an example, I have exported BLOG_DATA from OLDDB, where ...
1
vote
2answers
11k views

What is the difference between Schema and Database in Oracle?

In oracle, Datafile are system files where actual data is stored.The collection to datafile make Tablespace and atlast database is collection of tablespaces Correct me if I am wrong on the concepts ...
11
votes
2answers
3k views

Security for Application Developers doing PL/SQL work in Oracle

How do you handle the lack of Schema level privileges in Oracle? Oracle’s security architecture works well for applications that only need object level privileges and it works well for DBAs that need ...
29
votes
13answers
80k views

Eliminate duplicates in ListAgg (Oracle)

Prior to Oracle 11.2 I was using a custom aggregate function to concatenate a column into a row. 11.2 Added the LISTAGG function, so I am trying to use that instead. My problem is that I need to ...
15
votes
4answers
11k views

How to differentiate between SQL and PL/SQL?

I know the question might sound too stupid, but I never understood this part. SQL*Plus works with both SQL and PL/SQL. How do I know whether some code is SQL or PL/SQL? If my code has a for ...
25
votes
4answers
12k views

Why is OS authentication considered poor security for Oracle databases?

Oracle is deprecating OS authentication according to the Oracle Database Security Guide, which says Be aware that the REMOTE_OS_AUTHENT parameter was deprecated in Oracle Database 11g Release ...
8
votes
2answers
12k views

Why in Oracle 11gR2 I can't drop the materialized view with the same user that created it?

I created a materialized view with the DI_TEST_AL user, let's name it MY_MVIEW. It appears in the USER_OBJECTS table as MATERIALIZED VIEW, I try to drop it, I get a success message, but the object is ...
9
votes
3answers
3k views

How can I ensure that only one copy of a procedure is running in Oracle?

We have the need to ensure that only one copy of a particular procedure is running in Oracle. If it is already running and a user tries to open another, then it should error. Whats the best method ...
2
votes
1answer
1k views

Oracle 10gR2 to 11gR2 upgrade - performance hit [closed]

We've recently upgraded from Oracle 10gR2 (10.2.0.4 ) to 11gR2 (11.2.0.3) and we are noticing a significant hit in performance although execution plans are the same for the offended queries before and ...
9
votes
2answers
2k views

Oracle Shutdown Method

Shutting down a database before doing an upgrade or a patch can be done several ways. shutdown immediate; or shutdown abort; startup restrict; shutdown immediate; or shutdown abort; startup ...
5
votes
4answers
11k views

Why does = NULL not work in Oracle?

I recently realized that we need to use a special syntax IS NULL to compare a literal to NULL. Why does = NULL not work here?
1
vote
1answer
6k views

Oracle SYS Auditing with Audit Trail to DB

I have an Oracle Database 11g R2 on Oracle Enterprise Linux. I have enabled SYS auditing as: SQL> ALTER SYSTEM SET audit_sys_operations=true SCOPE=spfile; SQL> ALTER SYSTEM SET audit_trail=OS ...
1
vote
1answer
4k views

Is it possible to query value of SQLNET.EXPIRE_TIME parameter?

Can somebody advice whether it is possible to query for current value of SQLNET.EXPIRE_TIME parameter in Oracle 11 DB? Should select * from v$parameter return value of SQLNET.EXPIRE_TIME (if it ...
7
votes
1answer
164 views

Cardinality is so far off from reality

I've got a table where the cardinality for plans just seems waaaaaay too high - despite updating stats and even trying dynamic sampling for Oracle 11gR2. select count(*) from table1 where col1 = ...
6
votes
2answers
777 views

Oracle Advanced Queuing LIFO

With Oracle's Advanced Queuing is there a way to dequeue messages in a LIFO (last in first out) order? There is an indication through a lack of information that this is not an option, but perhaps ...
5
votes
1answer
14k views

oracle format specifiers: to_number vs to_char

SQL> select TO_NUMBER(123.56,'999.9') from dual; select TO_NUMBER(123.56,'999.9') from dual * ERROR at line 1: ORA-01722: invalid number SQL> select TO_CHAR(123.56,'999.9') ...
5
votes
2answers
2k views

What is the difference between these two create table statements?

a) SQL> CREATE TABLE xml_tab1(poDoc XMLTYPE); Table created. SQL> desc xml_tab1; Name Null? Type ----------------------------------------- -------- --...
5
votes
1answer
896 views

Enforce data integrity with a recursive table

I have an existing oracle 11g database schema that works with a web application. I am planning an expansion to the application so a web service can do data operations on the database. As part of the ...
4
votes
3answers
7k views

Is (and if how) it possible in Oracle to “insert into <table> values <rowtype-variable>” if <table> has virtual columns

Here's a table create table tq84_virtual_test_without ( col_1 number, col_2 number, col_3 number, col_4 number, col_5 number ); with the rule that col_5's value is the sum of the other ...
4
votes
3answers
2k views

TNS-12541 Error

I have grid installed in my pc but the problem is LISTENER does not start automatically. I have to start listener manually and then only LISTENER get started. But before starting listener if you check ...
4
votes
2answers
8k views

How can I view what NLS settings are active for other session?

I've got another session that I suspect isn't running with the 'proper' NLS settings for us in Oracle 11gR2. What can I query to show the NLS settings for a different active session - all of the NLS_*...
3
votes
2answers
26k views

Using Oracle client to connect to remote database

Although I can do a telnet to remote oracle port I am unable to connect. I have a following tnsname.ora connecting to oracle database using sql plus: remoteOracle = (DESCRIPTION = (ADDRESS_LIST ...
2
votes
1answer
1k views

Repartition Primary Key Index online in Oracle

I have an 24x7 OLTP (11gR2) application that endures heavy inserts on particular tables, traffic has increased to the point where we are getting heavy index contention. We use sequences for the ...
2
votes
1answer
164 views

Foreign Key Constraint over two tables

I am trying to put the following entity-model into practice: We have a list of Payments, each Payment belongs to a certain store and is of a certain payment type (e.g. 10€ maintenance cost in Store1,...
1
vote
1answer
27k views

ORA-01034: ORACLE not available in oracle 11g

I installed oracle 11g on ubuntu 14.04 and i started lister and the message is as below. LSNRCTL for Linux: Version 11.2.0.2.0 - Production on 10-OCT-2014 14:20:02 Copyright (c) 1991, 2011, Oracle. ...
1
vote
1answer
772 views

Change a partitioned global non-unique index that is the primary key to a non-partitioned unique index

One of the largest tables in our system has its primary key setup as a globally ranged partitioned (in huge, useless, multi-billion value ranges) non-unique index. Its values are just a sequence ...
1
vote
2answers
2k views

Factoring out subselect (with clause) ends in ORA-00904

I am trying fo factor a repetitive subquery with with but getting ORA-00904 over and over again. This is my base query which works quite well: select tka.id, tka.name, txt.text as langname, einh....
1
vote
2answers
136 views

Not able to select the disk during Oracle 11g Installation

Hi All, During the 11g installation on Win 2012, I am not able to select the available disks which are already stamped using ASM. Any idea what could be the reason? I have tried to select using ...
0
votes
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
votes
2answers
23k views

“ORA-01017: invalid username/password” : Why is that?

What is the difference between the two : SQLPLUS / AS SYSDBA and SQLPLUS Enter user-name: SYSDBA Enter password: If I use the first command I get connected and see the prompt SQL> but upon ...
0
votes
0answers
191 views

How do I open Data Pump Import Wizard in SQL Developer 4.1?

How do I find and open the Data Pump Import Wizard in SQL Developer 4.1? I opened the Help search tool in SQL Developer 4.1 and searched for Data Pump, and found directions that include: 1.) ...
0
votes
3answers
334 views

How do I determine the appropriate size for my tablespace when importing a .dmp file?

I have a 14g DMP file. How large should I size my tablespace to import it into an Oracle 11g database?
0
votes
1answer
11k views

Moving a 10g database to 11g with rman backup

Following Doc ID 369644.1, I'm trying to restore a 10g database into a 11g database ( version 11.2.0.1.0), which is in other server. What I did on 11g server: - Generate full rman backup of 10g ...
0
votes
2answers
518 views

Example optimisic offline lock in SQL/PL?

Can someone show me an example of an optimistic offline lock in an Oracle Stored Procedure?