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

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How to list all users that have grants over a package

I'm looking for some query to list all users that have grants over a package. For example, user Schema_A has been granted to execute package: B.MyPackage. I'm querying views or tables like: ...
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Is there a way to export an Oracle database to a CREATE DATABASE command?

I have an existing Oracle 11 instance, I want to export the database (which was created via DBCA) to an equivalent "CREATE DATABASE" command, handling the character set, etc. I'd also like to get a ...
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What would be the correct size of redo logs?

I installed and put in production a 11g database. I was adviced to size redo logs to 200MB each one. Now I see that my archived redo logs are each one 200 MB and all of them occupy a lot os disk space....
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Product of n Rows

From this data (assuming the number of rows is not known in advance): with q1 as (select mod(ora_hash(level),5) c1 from dual connect by level <=4) select * from q1; /* C1 -- 2 1 4 1 */ I ...
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425 views

Help with Query Tuning

EDIT - drachenstern: see this question for more information on this problem and on the source of his query below: Group data by non-unique keys by distinct time range Can someone please advise ...
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Are there performance benefits to turning off archivelogging? Is it wise?

The first part of the question is pretty simple; has anyone run a DB in both archivelog and noarchivelog mode? Were there any measurable performance benefits to turning off logging that you could ...
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Oracle RAC failover not working correctly

I have Oracle 11gR2 set up on a RAC environment with two nodes. I have SCAN set up, eg: I have two entries on the DNS set up so I can ping the SCAN name and reach either node. I can also ping both -...
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Gathering information to tune oracle row prefetching

I'm trying to determine a value for the number of rows an oracle client will prefetch (i.e. OCI_ATTR_PREFETCH_ROWS, exposed as setFetchSize in JDBC) that will minimize the number of server round trips ...
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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') ...
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Case Behavior Changed Between 11.2.0.1 and 11.2.0.2

I have a case open with Oracle and they say they can't reproduce this. Running the following in 11.2.0.1 or lower produces two rows from both of these queries, but in 11.2.0.2 the second query ...
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How to migrate Oracle database to MySQL server? [closed]

Currently our application is running using Oracle 11g database. We are developing newer version of the application which runs on MySQL cluster. We need to migrate the data from Oracle database to ...
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Oracle 10g express database link to Oracle 8i

I upgraded a 9i install to 11g with only one problem. Database links between 11g and our legacy 8i database are no longer supported. I have to transfer data from 11g to 8i two or three times a day ...
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Determine Index Compression Candidates Online

By doing the following I can determine if an index will benefit from compression and how many columns should be included in the compression: ANALYZE INDEX Owner.IndexName VALIDATE STRUCTURE OFFLINE; ...
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Help to understand explain plan in Oracle

I am running a query in some big tables, and although it runs fine even tough is a lot of data, I'd like to understand what part of it weighs on the execution. Unfortunately I am not too good with ...
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1answer
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Is there a timeout for a query over database link?

Edit/Preface: This question has been migrated from SO as I am particularly interested on the question on timeouts on DB link queries. The provided workaround from SO is somewhat OK, but I'm really ...
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how do I configure a new Oracle 11g instance to match the configuration of the old Oracle 10g server

How can I compare two Oracle database servers which are on two different machines? We need to ensure that the new server is setup correctly. For example, one machine is running Oracle 10g on Windows,...
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How can a datapump export have its resource usage limited on windows?

Doing an export of a number of users causes high CPU and I/O usage. I can mitigate the effects of the CPU usage using Resource Manager and setting the export session to a low priority group, but how ...
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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 ...
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DROP PARTITION strategy using LIST-REF composite partitioning

We have a large Oracle 11gR2 instance with some tables that have recently become an annoyance when deleting data. This database powers a large optimization cluster that takes input metadata from the ...
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942 views

Check if an index exists by comparing columns

We are currently using ALL_IND_COLUMNS to check if an index exists by its name or the columns it is using. The problem is that we can only check if the index exists with columns in a specific order. ...
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Should I group by and then join, or join and then group by?

(oracle's optimizer does the same thing for both approaches when just two tables are involved, thus my question involves three tables) Assume three tables t1, t2 and t3 with a pairwise 1:n ...
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Partition pruning with multiple date columns

I have a large table in Oracle 11g database that holds historical data from several years, so I would like to partition it by year. The problem is that the table has multiple date columns and they are ...
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Trying to copy a schema using impdp

I'm trying to copy a SCHEMA in its entirity using oracle's IMPDP tool. I've setup a database link back to itself and the link works fine. Then I'm running this: impdp username/password@instancename ...
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How to install Oracle 10g Express and 11g Enterprise on same machine

I have to continue maintaining an Oracle 8i database that receives information (about 20 Inserts and Updates a day) from a 9i database. I am upgrading the 9i database to 11g which does not support ...
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Ports necessary for Oracle 11g Replication across a firewall?

We have two Oracle 11g Enterprise Edition servers that need to replicate data via Oracle streams. However, the two servers are on untrusted domains and connect via a VPN. On end of the connection is ...
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How do I have Oracle ASM scan for and repair uncorrectable ECC errors (bad sectors)?

I'm running Oracle ASM (11gR2) with normal redundancy on SATA disks (WD Raptors). This is on a physical standby database, if it matters. Occasionally, disk sectors develop read errors (ECC failures). ...
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What must be in place to validate a XMLTYPE against a schema?

I have a procedure that generates an XMLTYPE and I want to validate it against a schema. The problem is that there seems to be a permissions issue running createSchemaBasedXML because when I run the ...
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Return a fully dynamic table from an Oracle function

I'd like to write a function with two IN parameters where the first one is a varchar and the second a list of varchars. Based on these I want to return a table with varying column amounts and names of ...
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Selecting from random amount of tables with identical structure

I am programming along the lines of an unfavorable design. I have no influence on the schema because it belongs to a readymade standard software. For simplicity let's say this software stores address ...
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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 ...
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Detect Index Coalesce

Is there a way to know if a COALESCE has been done on an index? Doing one doesn't seem to update the CREATED, LAST_DDL_TIME, or LAST_ANALYZED attributes. Note: I am not referring to the COALESCE ...
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Cummulative Sum with Reset Value

Consider the following table: ID | GROUP_ID | ORDER_VAL | RESET_VAL | VAL ---+----------+-----------+-----------+----- 1 | 1 | 1 | (null) | 3 2 | 1 | 2 | (null) ...
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Is there a bug with PL/Scope in combination with associative arrays?

I believe I stumbled upon a bug with PL/Scope in combination with associative arrays, but perhaps I overlook something. I have the following package create or replace package tq84_pkg_c as ...
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Dodgy causes of ORA-12549?

I am dealing with a rather massive ETL processing which keeps throwing me the ORA-12549 error. Have been looking for problems in the database so far and nothing. The DBA says the database is "fine" - ...
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Oracle 11g see transaction or session start time

I want to know when a session or transaction started. The deadlock file doesn't give me this information. Is there some logfile that keeps these records? I've got a transaction id "TX-1234-abcd", a ...
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Oracle 11g - Create Database fails?

I've just installed Oracle 11g and linked it to SQL Developer. I want to create a database for my django install. CREATE database 'django'; Error starting at line 1 in command: create database '...
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Which picture does the ORA-01830 error message refer to?

ORA-01830: date format picture ends before converting entire input string About the error message. I am confused. Which picture is the error message talking about? All I provided was a date.
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What does WE8DEC mean?

It is one of the commonly used character sets. What does it stand for? Is it an acronym for something?
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Using Inteval Datatype to store result of calculation

I want to create a table which has hiredate and Interval of hiredate and sysdate. How to create a column that automaticlaly stores the calculation.
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Does an Oracle nvarchar2 take twice as much space as varchar2?

Regarding point 4 of this question (which is in reference to MS SQL Server): VARCHAR does not store Unicode characters. NVARCHAR does store Unicode characters. Today's applications should ...
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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 ...
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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 '\...
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How to use simple output parameters?

I'm new to Oracle, so I apologize for such a simple question, but I've already wasted several hours on it. I have the following stored procedure: create or replace procedure MyTestProc (outparam OUT ...
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Oracle build_plan_xml visualizer

Background: Please review my related question that involves SQL Server : Interpreting SQL Server's Showplan XML I now have a very nice looking Execution Plan display for SQL Server (as a result of my ...
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Migrating to Oracle Flashback for Historization on Oracle 11g

Our application built using Oracle 11g requires that we keep historic data. The historization is legally mandated, and is mainly used for manual queries, when investigating problems, etc. Basically ...
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3answers
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What are the 'free to use' workload generators available for Oracle? [closed]

A couple that I know about are http://www.dominicgiles.com/swingbench.html and http://hammerora.sourceforge.net/ Are there any others? I am looking for tools what can generate random workload (...
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Possible RMAN orphan files in backup directory

I am trying to scrape together some space in my Oracle 11g backup directory in AIX. I have deleted obsolete files using RMAN's "DELETE OBSOLETE" command, but I see many (just under 200) files dated ...
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Materialized view: compilation_error

When executing the following code on the SCOTT schema I receive a compilation_error. What am I doing wrong here? I doesn't even tell me what the error is. SQL> create materialized view dept_emp_mv ...
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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 ...
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How many control files should I have?

On the Oracle Database Appliance, the default deployment only gives you a single control file. I find this a little puzzling. The single control file causes a policy violation in the automatically ...