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

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5
votes
1answer
9k views

How to find the schema name of a data pump dmp file?

I have been given a DMP data pump export file to import into my local Oracle instance. I've tried running this command line: impdp full=Y directory=DATA_PUMP_DIR dumpfile=MyDumpFile.dmp logfile=...
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 ...
3
votes
2answers
1k 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
votes
2answers
529 views

Example optimisic offline lock in SQL/PL?

Can someone show me an example of an optimistic offline lock in an Oracle Stored Procedure?
0
votes
1answer
741 views

SQL output formatting

I want this: "ACCOUNT_ID","MAJOR_VERSION","MINOR_VERSION","COUNTRY","ACCEPTANCE_TIMESTAMP","AGREEMENT_ID" "abcdefgh-1234-5678-ijkl-mnopqrstuvwx","20110901","1","CN","1329574013737","tos" But I get ...
0
votes
1answer
77 views

Is it possible to dynamically retrieve the number of columns in a view in Oracle?

As the title says, is it possible to retrieve the number of columns in a view dynamically? I'm learning Oracle 11gR2 and I'm checking out the V$ views. One of the things I want to do is output them ...
6
votes
1answer
98 views

Why are some aggregates treated differently in the RHS of a rule in the model clause?

With my limited understanding of the model clause, I'd expected the following three queries to return the same results because there are no nulls in the data, and the functions are equivalent: select ...
1
vote
0answers
119 views

Oracle specifying join order hint

Oracle 2 node RAC 11G R2 I have a query (this is a simplified version, but still exhibits the same issue as the larger query) that looks like this: SELECT t1.trip_id, t1.origin, t2....
2
votes
4answers
734 views

Oracle hint failure

When I run the PL/SQL block after the CREATE statement, I receive the duplicate key error I would expect if I did not add the hint. Any ideas to why the hint does not work? CREATE TABLE Sandbox.Clue ...
0
votes
2answers
488 views

CASE Statement - 1st case is being ignored

I have a table (usr_t_user_reg) in which I register all the users of the database. Now I want to create a view (usr_v_user_not_reg) which shows me all the users that I haven't registered yet or users ...
0
votes
1answer
597 views

Oracle 11gr2 instant client installation

I have an application that uses Oracle 11gr2. For the Oracle client installation, I first install InstantClient and then run the setup again, choose Custom, and choose "Oracle Database Utilities" ...
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0answers
14k views

Failure Of Backup Due To Limit Exceeded For Recovery Files Since Cannot Reclaim Disk Space [RMAN-03009,ORA-19809,ORA-19804]

While I try to take incremental backup level 0 by using the command RMAN> backup incremental level 0 database plus archivelog; , encountered this error. RMAN-00571: ============================...
0
votes
2answers
6k views

Update year alone in date (Oracle 11g)

When I checked one of my client's database, I found some mistakes which will make problems. The problem is that the date is showing as 01-01-01 when I try to display it in the dd-MM-yyyy format the ...
1
vote
1answer
4k 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 ...
1
vote
1answer
68 views

Redundant transpose. Case is not enough to solve my problem

I have db problem in transposing rows to columns. I am half way through the result but getting redundant data. My table: EMP_ID EMP_NAME SAL_PAID 01 ABC JAN 01 ABC FEB 01 ...
2
votes
1answer
8k views

SP2-0750: You may need to set ORACLE_HOME

I am getting following error message when i write sqlplus on command prompt SP2-0750: You may need to set ORACLE_HOME to your Oracle software directory Here are the path details
2
votes
1answer
2k views

Is there a way to explicitely have a not-null column in a view

If I create a view in Oracle, the column definition's not null characteristic is inherited from the base table: create table tq84_t ( col_1 number, col_2 varchar2(15) not null ); create view ...
0
votes
1answer
4k views

Oracle: list user-created tables in the SYS schema

I need to delete all tables (hundreds) in the SYS schema that someone accidentally created with sqlplus. Looking in dba_tables and dba_objects, I don't see a way to distinguish these tables from pre-...
0
votes
2answers
12k views

ORA-01031 while creating a view as DBA

I'm trying to create a view under my DBA schema on Oracle XE. I already did that on the productive database and it worked with a user with a lot lesser privileges than the DBA role. But now I always ...
1
vote
1answer
1k views

Alternative tools to export Oracle database to SQL Server? [closed]

I've got an Oracle database that I need to export (schema and data) to SQL Server. I am trying the Microsoft SQL Server Migration Assistant for Oracle, but it is horribly slow, grossly inefficient ...
0
votes
1answer
2k views

How to Drop tables being a SYS user

I am not being able to drop my tables using : drop table <table_name>; command. It says "the table is referencing primary keys of some other tables as foreign keys." , and when I tried to ...
4
votes
1answer
3k 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 ...
0
votes
2answers
616 views

Fatal NI connect errors

I'm wondering if there are any auditing processes I can enable to see what is causing these errors, like sql statements being run, or any other metadata that I could use to track down the source of ...
1
vote
2answers
906 views

fighting filter (nested loops) execution plan from Oracle

My query is: SELECT category, count(*) FROM large_data_table t WHERE (t.val IN (SELECT val FROM SMALL_TABLE WHERE id = 1)) OR (t.val IN (SELECT val FROM SMALL_TABLE WHERE id = 2)) GROUP BY GROUPING ...
1
vote
2answers
8k views

Run Unix command using PL/SQL

Is it possible to run a Unix command using a query in Oracle? I want to run simple commands (like df -h) using a query. Is this at all possible or am I wasting my time? I don't want to use a ...
1
vote
2answers
2k 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 ...
1
vote
1answer
35 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 ...
2
votes
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 ...
4
votes
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 roles....
0
votes
1answer
530 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 ...
0
votes
2answers
3k views

Difference between chained and migrated rows

What is the difference between chained and migrated rows? Also what query should be used to display these rows? (I'm using Oracle 11gR2 database)
1
vote
1answer
3k 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?
0
votes
1answer
187 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
votes
2answers
1k 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 ...
2
votes
1answer
76k 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
votes
1answer
960 views

Flashback feature in Oracle 11g?

I am using Oracle 11gR1. As a part of a project, I have to execute multiple update statements by disabling a few constraints (triggers and check constraints) which could result in a corrupted database....
2
votes
2answers
2k views

Create Oracle ASM Disks Without Installing Oracle

I have been asked to setup workstations (VMs) for an instructor's Oracle 11g R2 Workshop. I am finding the documentation that was downloaded from the Oracle Academy site extremely underwhelming. I am ...
1
vote
1answer
437 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
vote
1answer
9k 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
votes
1answer
698 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 ...
2
votes
2answers
6k views

Setting NLS params in logon trigger don't work in oracle 11g

We have a trigger setup so that when a specific user logs in, their NLS session parameters are modified. This used to work on Oracle 10g. We've just migrated to Oracle 11g RAC, and the session ...
4
votes
2answers
2k views

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 ...
0
votes
0answers
936 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. ...
0
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0answers
168 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 ...
3
votes
1answer
10k 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 product(...
2
votes
1answer
773 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 ...
4
votes
1answer
604 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 ...
1
vote
1answer
19k views

How do I find out the “redo log file max size” in Oracle 11R2

I'm working with Oracle 11R2 and I want to see the max size of my redo log files (I didn't install Oracle so I'm not aware of the configuration). I have searched the Internet but all I have found ...
3
votes
1answer
1k 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 ...
0
votes
2answers
63 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 ...