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1answer
7k views

How index work in oracle? [duplicate]

I want to understand : How index work in oracle. How they are stored in the disk. How they increase the efficiency of a query? By third point I means how Index contribute to the efficiency of ...
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2answers
12k views

Finding all sql id, sql text, number of executions,execution time between two AWR snap ids in oracle

AWR report provide the SQL information for top 10-20 SQLs, is it possible to get information on SQLs that do not make it to the top list. How do we find all sql id, sql text, number of executions,...
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0answers
78 views

Equivalent of old style join with new style

Can someone please help me write the following join expression in new style: Select tb1.col1,tb2.col2 from table1 tb1, table2 tb2 where tb1.col1>=tb2.col2 I know that the equivalent of ...
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0answers
1k views

What problems can be caused by dropping a rollback segment manually?

Oracle version: 11.2.0.1 I have the following error: "Transaction recovery: lock conflict caught and ignored" I can't upgrade my database now. I had a RAC. Removed one node, but the undo tablesapce ...
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1answer
1k views

ORA-44001: invalid schema

I have a db dump which containts db dump for three schemas for e.g. alpha bravo charlie in one file, exported through EXPDP. now when i am trying to import these through following command: IMPDP ...
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414 views

Installing oracle 9i on windows 7

Is it possible to install oracle 9i on windows 7 32 bit? And where can i download the standalone oracle http server?
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1answer
2k views

How to Convert a Table into XML Document

I have a table say SCOTT.DEPT and I want to convert it into an XML document. Is there anyway to accomplish this task? Kind Regards,
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0answers
294 views

ORA-13901 Object UNDOTBS01 was not found. ORA-06512: at “SYS.DBMS_SERVER_ALERT”, line 7

Oracle version is : 11.2.0.1 I have created alerting on every error occurring in database, and in this alert log I've found the following errors ORA-13901: Object UNDOTBS01 was not found. ORA-06512: ...
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1answer
142 views

“Oneway” Replication from Oracle DB to TimesTen

currently I'm really stuck into a problem and I not able to finde a nice way to realize that. I need a suggestion to replicate from oracle db (some tables) to a TimesTen. A connection is only ...
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0answers
519 views

Datalink error when executing remote query

This afternoon i was working with an old datalink defined to transfer data from one database to other. It's the first time i've worked with this 'trick'. We use an specific user to work with the ...
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1answer
305 views

Does Oracle Partition by Reference optimizes join queries

Oracle 11g has a new feature in partitioning tables called partition by reference. I want to know whether Oracle joins (nested-loop-joins or hash-join or ...) rows from proper partitions when joining ...
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0answers
2k views

sqlldr: command not found

I have a script which has this command 'sqlldr' which gives me the error sqlldr: command not found when I run this script. I googled and found that people say that this command should be there in my $...
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0answers
565 views

Multiple Oracle TNS error

I have an Oracle 11gr2 32 bit on windows 2008 32 bit OS 8 gig ram. There is an application running on 6 machines simultaneously that accesses the Database on this Server. I get the below errors in my ...
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0answers
169 views

Oracle: REGEXP functions hang with “DIRECT PATH READ”

Oracle 10.2.0.5 OS: Solaris Problem: Need to filter a table with REGEXP. Occasionally sessions that execute Regexp on multiple rows hang on if SQL contain like: "where id in (1,3...) or id in (5,6,7,...
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0answers
31 views

How can I calculate database disk usage in Oracle? [duplicate]

I'd like to get the real disk usage of a database, i.e. the amount of megabytes or gigabytes (could be any) that the tables use with all of their respective rows.
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61 views

Logical or in oracle PL/SQL

I have this code: declare error1 number; error2 number; error3 number; begin error1 := 1; error2 := 0; error3 := error1 | error2; -- should be error3 = 1 end; But I dont know how to ...
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0answers
5k views

ASM drop disk hangs (STATE DROPPING)

I have added disk into the RAC system by the following way: I have disk /dev/sdh1. Marked it as an ASM disk: --On node 1 oracleasm createdisk DISK7 '/dev/sdh1'; --On node 2 oracleasm ...
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0answers
2k views

Oracle profile: PASSWORD_REUSE_TIME and PASSWORD_REUSE_MAX

Let's say I have configured PASSWORD_REUSE_TIME=1 and PASSWORD_REUSE_MAX=5 for Orale user profile. My initial understanding was that it should prevent the user from using the same password until he ...
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0answers
205 views

How Oracle DB maintains client identification

I know in 'dedicated server' mode we have one user process for each client and pool of user process in 'shared server' mode. in either case How oracle maintains the client identification ? Please ...
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0answers
576 views

ClassNotFoundException when trying to deconfig Oracle Enterprise Manager

The Enterprise Manager for my Oracle 11.2 installation doesn't work anymore as described in How can I change the connection descriptor used by Oracle Enterprise Manager? and I tried to re-configure it ...
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0answers
2k views

Oracle Transaction recovery: lock conflict caught and ignored

In alert log there are a lot of "Transaction recovery: lock conflict caught and ignored" statements. I've found some information, that this error is caused when there is an active dead transaction. ...
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0answers
104 views

how to stop all Oracle instances [closed]

Is there any way to stop(or restart) all Oracle instances? I can't control my Oracle service called "OracleServiceOrcl" so I need to stop all running Oracle instances.
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0answers
700 views

Execution time vary for the same query

I have a query which looks like this: select * from ORDERDOC, ORDERPOSITION where ORDERDOC.id = ORDERPOSITION.orderId --some other conditions; Execution plan looks like this: 0 SELECT ...
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0answers
186 views

dbms_utility.get_dependency give me error “ORDER SIBLINGS BY clause not allowed here” , why?

Oracle 9.2.0.8 running at linux . I'm trying identify the dependencies of one object with the dbms_utility.get_dependency command. But unfortunately it always return the error ORA-30929... I ...
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0answers
929 views

Oracle EXP Error ORA-12704: character set mismatch

I need to duplicate a Oracle 11g Express Edition database from one computer to another computer. I tried exp sys/password FULL=Y FILE=backup.dump (the idea is to do a imp on the other pc) But it ...
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0answers
60 views

Advice on DB Changes

Requirement: I'm required to prefix a couple of strings to the existing one. I.e. The current way, the Accounts been recorded in AccountID field looks as "621230093VN00" Under the new format ...
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0answers
5k views

How to fix error ORA-00322: log is not current copy

I have to submit my project a day after tomorrow. My project is ready but I am having above mentioned error while connecting to Oracle database. I tried the following solution: Enter user-name: sys ...
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0answers
132 views

Viewing tables and data from a tablespace that was attached from another database

I'm using a database Oracle 11g. I have a DBF file of an old tablespace from a different database that I want to connect to the existing database. I've created a tablespace with REUSE caluse, and it ...
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0answers
388 views

Error ORA-06550

CREATE OR REPLACE PROCEDURE pro_department_report AS v_did department.deptid%TYPE; v_dname department.dname%TYPE; v_sname student.sname%TYPE; v_count NUMBER(2); v_sdid student.deptid%TYPE; CURSOR ...
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0answers
410 views

My SQLs are taking too long to execute for first time everyday in Oracle 11g [duplicate]

whenever I make a new request in my application it takes to long to respond for the first time and all the subsequent requests are faster. If I do it again after some hours or tomorrow again it takes ...
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0answers
172 views

Oracle APEX Button creating ORA-00920

I have a table for user registration with a column for account_status which I filled with the content from SYS.dba_users. I also have a APEX application for this table and some other stuff and want to ...
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2answers
1k views

Warning before issuing delete/update command in mysql/oracle , then executes

Is there any utility , function either in mysql /oracle that if i issue some delete/update command wrongly , a message must prompt at command_line* (if possible in ubuntu) asking whether "you sure to ...
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0answers
82 views

Query with large number of or'ed predicates on the same column?

At one place we need to query a table to determine whether any records exists that are in a subset of the same table. The columns that are queried are varchar columns containing file-paths, and we ...
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0answers
322 views

How does tablespace sizing works in Oracle

Let's say I have an input of 20 gigabytes of raw data (text file) which in turn I would into an external table and would then swap partition in order to place them on my database. The question now is ...
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1answer
238 views

What are the side effects of raising the PROCESSES system parameter?

We have a legacy application (ERP) that, because of technical issues, spawns a new OS process (.exe - ms windows clients) for each screen requested by the user. Also, each company branch (> 20) has ...
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0answers
155 views

How to grant privileges for a user to create views on specific tables on Oracle SQL?

I just added: GRANT CREATE VIEW TO user1; But it gives user1 access to ALL the tables, I would like them to only have access to the tables where the field X is user1
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1answer
123 views

Oracle DBMS Scheduler - what if database fails?

We are moving some Oracle overnight jobs off a cron server and running them via Oracle DBMS Scheduler instead. It is my understanding that if the database fails overnight then the job email ...
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0answers
217 views

Oracle - How can I improve this query?

We have performance problems with some queries. We always use the rank() function to get the latest entries with a status. The question is, how to speed up things. CREATE TABLE PAYMENT ( CLIENT ...
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0answers
123 views

Is Oracle pro*C/C++ part of any of the Oracle database editions or is it a separate product to be purchased? [closed]

Can somebody tell me if Oracle pro*C/C++ comes with one of the Oracle database editions such as Oracle Database Standard or Enterprise or should it be purchased separately?
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2answers
4k views

ORA-00338: log # of thread # is more recent than control file

We are facing the following error on our production database: ORA-00338: log # of thread # is more recent than control file The database crashed and there was no recovery action. What could I ...
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0answers
456 views

Oracle Installation issue on Oracle Linux 6.4

I am trying to install Oracle 11g(11.2.0.1.0) on Oracle Linux 6.4(Remote Server). I get the following error(s) when Database Configuration Assistant is running ORA-01092: ORACLE instance terminated ...
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0answers
404 views

How to get session parameters changed by the user in Oracle?

Oracle 11.2.0.3 . I need to identify all "alter session" changed for a specific session. There is some v$session_* where I able to get this information? My objective is part of investigation what ...
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0answers
206 views

Oracle DBMS_MVIEW.REFRESH debugging output?

Is there any way to see what DBMS_MVIEW.REFRESH is actually doing? I want to investigate partition change tracking (PCT) and verify that it is indeed only updating modified partitions.
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1answer
177 views

Oracle_Loader Quote in quoted field

I have a create table ext_file (....) type oracle_loader query that opens a text file to pull data out of it. The access parameters are: records delimited by newline fields terminated by '\t' ...
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votes
1answer
2k views

Oracle: Tables and Views missing from the all_objects dictionary

I have a couple of database instances that are having the curious issue where tables and views do not show up in the all_objects dictionary which is causing some issue with certain schema viewing ...
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0answers
971 views

FOR loop oracle query with calulation

I have a list of distinct areas, and would like to track statistics for those districts in a SQL statement. I currently have a setup that runs some summary information, but it doesn't include the ...
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0answers
310 views

After RAM upgrade on 32-bit Oracle server, ORA-04031: unable to allocate x bytes of shared memory

We are in the process of upgrading our Oracle database server at work, from SUSE Linux Enterprise Server 10.4 / Oracle 10g / 4GB RAM (Intel 32-bit) to Scientific Linux 6.4 / Oracle 12c / 8GB RAM (...
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0answers
28 views

Create a schema like an existing schema [duplicate]

I have a existing schema in my database called SCOTT, how can I create a new schema with exactly the same privileges which SCOTT schema is having? Is there any create like or some command to create ...
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0answers
2k views

Not able to login in Oracle 11g console using sys/system@SID as sysdba

I am not able to login into Oracle 11g console using administrative account, when I tried it gives me error of wrong username and password. Then I tried from SQL plus, it got logged in without any ...
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0answers
44 views

Reliability of blobs in MySQL

I'm in the process of migrating an application working with Oracle to MySQL. That application stores data in the form of blobs, which can be pretty big. The Oracle production database is 60 Gb large ...