Oracle is a RDBMS (Relational Database Management System) created by Oracle Corporation. It supports a large number of languages and application development frameworks. Its primary languages are SQL, PL/SQL and Java. Also included is support for C (Pro*C, OCI and EXTPROC), C++ (OCCI) and Java (JDBC) ...

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ORA-01435: user does not exist

I am trying to run the SQL queries coded on my friend's laptop onto mine. I have imported the .sql file into SQL developer and I'm trying to run it.However, I keep getting the error: 01435. 00000 - ...
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2answers
381 views

Expand sparse table with self outer join on distinct values

I have this: g1 | g2 | x ---------+-----------+----- New York | Monday | 210 New York | Tuesday | 258 Chicago | Monday | 30 Chicago | Wednesday | 25 LA | Thursday | 40 ...
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1answer
15k views

SYSDBA password in Oracle DB

I am connecting to Oracle DB using sysdba: sqlplus / as sysdba What is the default password for sysdba user. I tried in net and found out the default password is change_on_install but it is not ...
4
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1answer
179 views

Oracle BLOB store performance

LOBs in Oracle are stored in-row when they are less than 4K in size and out-of-row otherwise. I'm wondering how do SECUREFILE storage options COMPRESS and ENABLE STORAGE IN ROW work? I have a lot of ...
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2answers
38k views

How to resolve ORA-01031: insufficient priviledges error on Windows installation?

I installed Oracle 11G on my Windows 2008 R2 Server. I also installed Oracle Client Libraries using separate installation media. After the client installation, when I try to log into the database ...
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1answer
4k views

Update oracle sql database from CSV

I tried google at first but no luck. Is it possible to update tables from csv file? I am using SQL developer and I am using a script to export edited rows to a csv file. I would like to update the ...
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1answer
268 views

Invalid rowid error

I'm trying to see, how UPDATE Lock helps to minimize error while dml (delete/update) operations. declare cursor update_lock is select empno from emp where deptno=&no for update of sal; num ...
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2answers
6k views

Oracle 11g: performance improvements of inserts

I have a table of 500 millions of rows (and growing) I did the following to improve performance of inserts: On database side: dropped all indexes and constraints disabled logging On application ...
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0answers
150 views

How can I count the total number of document indexed by my oracle.text index?

I know I can use ctx_query.count_hits to count the number of document matching a query, and similarly, I can use count(*) where CONTAINS(...) But these are only options if I actually have a query. ...
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2answers
288 views

Expanding parent-child tree with additional tables

I have readonly access to a table (Oracle database) which contains a hierarchical structure, represented via parent-child. I need to add another table, which will expand the existing hierarchical ...
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2answers
9k views

Why can't we write ddl statement directly into the PL/SQL block

Why can't we write ddl statements directly in PL/SQL block, for example when i write CREATE OR REPLACE PROCEDURE test IS BEGIN truncate table table_name; // error END test; / But, CREATE OR ...
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1answer
852 views

Materialized view log not updating

Under what conditions would a materialized view log not update? I must be missing something. I've got a 10gR2 database. I can create the following MV logs: CREATE MATERIALIZED VIEW LOG ON linked_t1 ...
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68 views

Troubleshoot abnormal connections

We experienced extreme slowness of login on 6 Mar in 1 of our Oracle servers (Solaris 10) running Oracle DB. During that period of time, our firewall had detected and dropped many TCP connections ...
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3answers
5k views

Unable to start Oracle (11g1) due to bad memory configuration (ORA-00837)

I decided to reduce the memory allocation of a local developer instance, and was told that the following command did the job; alter system set memory_max_target = 512M scope = spfile; Which I guess ...
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1answer
2k views

Does 'update global indexes' not work if the index is already unusable?

I have a partitioned table in Oracle 11g with a PK (global index). If I truncate one of the partitions with ALTER TABLE tbl1 TRUNCATE PARTITION p1; the global index has the status UNUSABLE. If I ...
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1answer
3k views

When is data moved during an Oracle partition split?

I need to split an Oracle partition, and I'm confused about whether or not Oracle is going to physically relocate the data when I execute the split. Here's what I intend to do: alter table ...
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1answer
420 views

A stored procedure to bulk load in Postgres or Oracle given a URL [closed]

Is there a stored procedure available in Postgres or Oracle that does a bulk load given a URL, as in: url_bulkload csvFile.ctl Where csvFile.ctl is # # csvFile.ctl -- Control file to load CSV ...
4
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1answer
745 views

Oracle: How to gather stats in a logical standby database?

I have a Primary and a (logical) Standby Database. The Schema 'APP' gets synced. Now a User has performance issues running a query against some tables in this 'APP' schema of the Standby Database. On ...
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3answers
42k views

Difference between database vs user vs schema

I'm really confused with the terms database, user and schema. Can anyone explain how they are different from each other (if they are)? If they are same then, what are the similarities between them? ...
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2answers
208 views

Is there any way to find out when particular view was compiled?

I have an Issue with a view, recently I made changes to the view and committed the code (in SVN). Code was moved to another repository and compiled, but my modifications are not reflected. I searched ...
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1answer
4k views

Import data from Oracle to SQL Server [duplicate]

I have an Oracle database in a remote server. I want to import data from it to SQL Server on a local machine using a stored procedure or job shedule but I don't know how can I do it.
5
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2answers
541 views

Defining constraints in `CREATE TABLE` statements

Recently I have been using a Database Abstraction Layer built by a Python web-framework called web2py (click for their DAL syntax). They include the option to include your constraints within the ...
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1answer
566 views

oracle huge hash_area_size

I am wondering what is the maximum setting for hash_area_size parameter? I'm trying to perform a huge join which ends up allocating 10Gb of temp space and completes in an hour. 10Gb is not that much ...
5
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1answer
653 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 ...
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1answer
540 views

Finding why an Oracle listener got automatically restarted

I got the following message in the <listnername>.log file. I want to find out the reason why it got automatically shutdown and restarted again with different PID. 03-MAR-2013 03:00:57 * ...
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1answer
1k views

Can a view affect ALTER TABLE commands?

I provide a database system to a number of customers. The database is installed locally on Oracle. We periodically upgrade the database structure (either adding new fields, renaming old fields, ...
2
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1answer
8k views

Completely uninstall Oracle server on Linux

I have searched lot in Google for how to uninstall Oracle on Linux, but I can't figure it out. I think that I need to reinstall the server because I get a lot of errors when I try to startup the ...
2
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1answer
385 views

Consistent Database Export of Oracle Database

I'm quite confused and I need some clarification! I do full export of database with Export Pump (for replication/duplication). What I usually do is: SQL>SHUTDOWN IMMEDIATE SQL>STARTUP ...
2
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2answers
965 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 ...
5
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2answers
3k views

Why is truncate DDL?

I have an interview question, which being asked during my interview. I answered the question, but interviewer was not convinced with my answer. So, please let me know the what would be the correct ...
3
votes
1answer
3k views

Where's my Network Alias list in Oracle?

I can't select any Network Alias from the Network Alias Drop-down. My TNSNames.ora file is in C:\Oracle My other machine that is a fresh install doesn't have this problem. I get an error when I ...
5
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2answers
5k views

How to Install/Configure Oracle Instant Client on Ubuntu

Installing the Oracle Instant Client on Ubuntu/Debian based systems is awkward since Oracle is RPM centric regarding its Linux support. What's the best way to easily install and configure the Instant ...
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2answers
152 views

oracle null value in quotes - yet another newbie question

I have a where clause like "and uc.completion_status in ('[P....]') " here ('[P....]') is the user input from taken a dropdown list in the user interface. and dropdown list consists three options ...
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votes
1answer
5k 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 ...
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votes
4answers
18k views

Oracle startup error (could not open parameter file)

I installed the Oracle 11g server on Ubuntu 12.10. But I can't start the server. When I start up the server, the following error occurs. SQL> startup ORA-01078: failure in processing system ...
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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 ...
2
votes
1answer
2k views

Specify Server for DBMS_Scheduler Job in Policy Managed RAC

A unit test requires a dbms_scheduler job to run on the same RAC node as the unit test is being run from. I know that with an Admin managed database this could be done by creating a service that ...
3
votes
3answers
360 views

Sum Up values in a query based on other information

I am trying to grab the sum of 2 columns if 1 column is the same. I currently have a record-set that looks like this: I get these results by running this statement: select distinct a.eventnum, ...
2
votes
1answer
523 views

Blocking incoming database links

Let's say there is an Oracle database A and another Oracle database B. Our database is A. Is there a way to block database links from B to A?
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1answer
1k views

Is there an execution difference between a JOIN condition and a WHERE condition?

Is there a performance difference between these two example queries? Query 1: select count(*) from table1 a join table2 b on b.key_col=a.key_col where b.tag = 'Y' Query 2; select ...
4
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3answers
24k views

“ORA-01950: no privileges on tablespace 'SYSTEM' ” : What error is it?

Earlier I created a user : SQL>create user suhail identified by password SQL>User created. SQL>Grant create session,create table to suhail; SQL>Grant Succeeded. but when I login as ...
9
votes
1answer
36k views

Oracle 11g listener fails with ORA-12514 and ORA-12505 errors

I run an instance of Oracle 11g locally on my development machine and can connect to the local instance directly via SqlPlus: c:\>sqlplus ace SQL*Plus: Release 11.2.0.2.0 Production on Mon Mar ...
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2answers
2k views

Oracle 11g R2 - same query sometimes fast, sometimes slow

I have a simple update query on a table with about 100 rows in it: UPDATE RESULTS_DATA SET IMAGE_BLOB=:myBlob WHERE MEASUREMENT_INDEX=:mIndex AND BATCH_ID=:batchId AND SYSTEM_ID=:sysId ...
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2answers
13k 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 ...
2
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1answer
1k views

Fast paginated result, for various filter clauses

I have been working on obtaining a paginated result from a table in my database (11g). While I have a query that does work (ie, the result is correct) it does not perform as well as I'd like to and I ...
1
vote
1answer
351 views

Update field1.table1 based on compound join between table1 and table2 - Oracle

I want to run update statement on Oracle 11g, but it fails with the following error: SQL Error: ORA-01427: single-row subquery returns more than one row 01427. 00000 - "single-row subquery ...
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0answers
228 views

TimesTen performance as compared to 10g

I am new here, so please be nice... I have a question regarding TimesTen & Oracle. I have attempted an experiment with both pieces of software, and realize that the query speed on a table is ...
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1answer
491 views

Possible reasons for slow BLOB updates in Oracle?

We have an application that transfers .bmp images as BLOBs to an Oracle table. One of the users of the app has complained that it is taking 2-3 seconds to transfer each image. Each image is ~1.2Mb. ...
3
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1answer
2k views

Oracle Illegal use of long datatype when moving tablespace to bigfile

I am currently migrating all the tables in my database to a bigfile tablespace. I have written a script to do this and all tables are migrated successfully except one. I am given the error: Error ...
2
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2answers
237 views

SQL Max() revision number

This SQL returns a table with everything unique, which is what I want. However, if there are two (or more) event numbers, I need it to return the line with the highest rev_num for that eventnum. I ...