All versions of Oracle. Also add a version-specific tag like oracle-11g-r2 if that context is important in the question.

learn more… | top users | synonyms

1
vote
1answer
18k views

Why does DBMS_JOB.SUBMIT execute immediately when NEXT_DATE is in the future?

I wanted to create a job that will run tomorrow at noon and recur every day at noon, so I executed this script: DECLARE X NUMBER; BEGIN SYS.DBMS_JOB.SUBMIT ( job => X ,what ...
3
votes
2answers
4k views

How do I limit Oracle to use specific ports?

I've built a new Oracle 9iR2 instance on a Windows 2003 32-bit cluster. Of course, it's version 9i for reasons out of my control. Several application servers connect to this instance, and each opens ...
1
vote
0answers
57 views

Diskless Oracle and persistent filesystems

I'm putting together a diskless Oracle database SLES image. What will need to be kept stateful? For example, what filesystems need to persist? Right now, the easy ones I know of are /home, /perf ...
24
votes
2answers
3k views

As a DBA, how would I go about transitioning from Oracle to SQL Server?

I'm an Oracle DBA that also has Sybase experience. What are the major architectural and conceptual differences between the two RDBMS platforms? An answer similar to the SQl Server->Oracle question ...
3
votes
1answer
623 views

Is it possible to configure Oracle's CONNECT THROUGH based on roles?

I don't have too much administrative experience with Oracle DBs, so forgive me if I make a fool out of myself. In our current setup, each of our clients has a database user on our Oracle database. ...
0
votes
1answer
6k views

Listener failed to start [closed]

I have installed Oracle 11g on my Window7 computer; whenever I try to create a connection in Oracle SQL developer I get this error TNS:listener does not currently know of SID given in connect ...
1
vote
1answer
2k views

bad bind variable in trigger

i'm trying to update the table whenever complaint has been registered create or replace trigger complaint_advertise BEFORE INSERT ON COMPLAINT_INFO FOR EACH ROW DECLARE BEGIN UPDATE ...
1
vote
1answer
6k views

restore database from dmp file

I have a situation: I have a dmp file and a database with old data server crashed and the latest data we have ar in the dmp file! we managed to pull the server back but it has old data! so we need to ...
1
vote
3answers
2k views

oracle crash with ORA-00942: table or view does not exist

we use oracle9i database. and since last week my oracle crash many times, after running for 30 hours more or less. we see errors repeat in my trc file and alert log : qmhGetHTTPError: Got unknown ...
4
votes
3answers
493 views

Why keeps Oracle writing into WARNING_SETTINGS$?

For tests we have Oracle 11 instance running on a RAM disc. Since the RAM disc is limited in size the database must not do any auditing or anything that keeps increasing the size of anything. We ...
1
vote
2answers
3k views

LEFT JOIN conversion to INNER JOIN, can't change FROM clause

I have 2 tables: BASE is master and is linked with CHILD via field ID: Left outer Join / 1:N relation. These 2 tables contain historised data, defined by 2 date-fields: start_date and end_date. ...
1
vote
2answers
5k views

ORA-39142: incompatible version number 3.1 error work-around

I am trying to import an Oracle backup .DMP file into a new Oracle DB and I'm getting the error "ORA-39142: incompatible version number 3.1". My research tells me that this is because the version of ...
1
vote
2answers
679 views

Oracle Databases - need to export nightly for backup/DR purposes

I know nothing about Oracle databases, so if my question's path seems odd, feel free to tell me the right way to do things. I have 2 ways I see currently that I can backup a server running 3 Oracle ...
1
vote
1answer
449 views

file not found - how to remove its configuration?

I run oracle 10.2.0.5. I have the following: SQL> select file#, status, error, recover, tablespace_name, name 2 from v$datafile_header 3 where recover='YES' 4 or (RECOVER IS NULL AND ...
2
votes
1answer
1k views

Oracle SQL Loader - load file where record is composed of “n” delimiters

How would you write a control file for Oracle SQL Loader that treats each record as being composed of 3 commas? I have read the documentation, however I cannot find how to handle this scenario, ...
5
votes
1answer
306 views

Oracle: DB *partial* constraint?

I am pretty new to Oracle and the database world. I am not sure if the title makes any sense at all, so I'll just go ahead and explain my situation. I currently have a table at hand that records ...
3
votes
2answers
487 views

How can I change three hundred procedures at once?

I need to change about 300 procedures and packages in the database, due to a migration that will accomplish this weekend. We will do a migration from one server to Exadata. However the database has ...
4
votes
4answers
31k views

Convert a Unix timestamp to a DATETIME in a View

I have a table that stores a unix timestamp. To query this as a date, I'm attempting to convert this timestamp to a datetime type in a view. Unfortunately, I can only seem to get the DATE portion out. ...
1
vote
2answers
313 views

Join on clustered tables shows greater cost than non-clustered tables?

I have created a cluster and have two tables emp and sep on the cluster. When I do the simple query... explain plan select * from emp_cluster join dep_cluster using (dno) the cost is 26. I ...
8
votes
3answers
8k views

What does NVL stand for?

What does NVL stand for? I'm talking about the Oracle and Informix (perhaps some others too) function used to filter out non NULL values from query results (similar to COALESCE in other databases).
2
votes
0answers
298 views

Oracle faster overlap check [closed]

We've a table with two columns beginrange and endrange, which contain hex values. To this table no overlapping ranges should be inputted. We had implemented the check by having a composite functional ...
1
vote
1answer
6k views

Materialized view taking too much time

i create a materialized view fast refresh. it takes almost 45 min to create but it did not refresh in 24 hours. i tried it on with index and without index. i check the log of all table max record in ...
1
vote
1answer
603 views

Improve performance for my plsql block

First of all let me make kind of a disclaimer here: 1) i'm a developer, not an administrator; 2) and i dont have admin rights on my database. 3) table specs : -- oulp_path_attendance_base_t - ...
1
vote
1answer
228 views

What is the performance difference between local text index and domain text index in oracle?

What is the performance difference between local text index and domain text index in oracle? Also what is the cost of rebuilding the domain text index when I have to split just one partition? Does the ...
-6
votes
1answer
10k views

how to query multiple row data in single column in oracle?

i have a table in which the values are id value ---------------- 1 10 1 20 1 30 2 33 2 34 I want the output given below using sql: id value ...
6
votes
2answers
2k views

Making the Oracle optimizer use a virtual column to find out about a partition

I have a large table that has three columns like this: "START_DATE" DATE, "START_VALUE" NUMBER(10,7) "START_DATE_VALUE" NUMBER(18,7) GENERATED ALWAYS AS ( (extract(YEAR FROM START_DATE) * ...
3
votes
0answers
378 views

What do I need to do to avoid ORA-32696 errors?

I have a SELECT query using several WITH blocks. Sometimes it runs successfully. Very often it fails with the error "Lookup Error - Oracle Database Error: ORA-32696: HTI: No free slot". I Googled the ...
0
votes
1answer
153 views

Best practices in securing Oracle Standard edition one [closed]

I have a database server with Oracle Standard Edition One. I'm interested what are the best practices to secure Oracle? I have Java web application installed in the same server. The Java application ...
4
votes
1answer
8k views

What units used in DBA_TABLESPACE_USAGE_METRICS?

What units are used in the usage metrics (USED_SPACE and TABLESPACE_SIZE columns) described in Oracle's DBA_TABLESPACE_USAGE_METRICS static data dictionary view? The Oracle Database Reference only ...
5
votes
2answers
11k views

How Does Oracle Handle Multiple Concurrent INSERTs Against One Table

I am trying to understand Oracle 11g a little more closely. My question is simple: how does Oracle handle two sessions that are attempting to insert records into a single table at the same time. For ...
1
vote
0answers
63 views

sdo_tune.quality_degradation returning negative values

While running the sdo_tune.quality_degradation function on one of our Oracle databases most of the results were around 1 but a number had values like -556127.225. Does this mean that these indexes ...
3
votes
1answer
71 views

Discover SQL Time on Oracle10g

I'm using Oracle10g and I have a problem that is challenging me. The application has a timeout of 45 seconds. It accesses a user from my database and always performs the same action. The problem is ...
4
votes
1answer
837 views

Measuring the relative performance of queries given the assertion that “cost” isn't reliable

The cost field is a comparative cost that is used internally to determine the best cost for particular plans. The costs of different statements are not really directly comparable. Source Does ...
12
votes
2answers
516 views

Are there any benefits in certain ordering of columns when defining indexes

For example, if I have two indexes: CREATE INDEX IDX_1 ON MY_TABLE_1 (ITEM, DATE, LOCATION) COMPUTE STATISTICS; CREATE INDEX IDX_2 ON MY_TABLE_1 (DATE, LOCATION, ITEM) COMPUTE STATISTICS; ...
3
votes
3answers
770 views

Is it possible to virtually vertical partition and oracle database table?

Just like the question asks; is it possible to transparently partition a table vertically, by using virtual partitions? I'd imagine if it was possible, that columns would just be stored in separate ...
6
votes
2answers
5k views

Oracle's Merge v. Select->Update/Insert

What is the faster statement? A MERGE or Select->Update/Insert depending on if it returns a value? I'm trying to optimize a database, but I haven't found any speed tests comparing the two. I found ...
2
votes
2answers
2k views

oracle tablespace character set

I'm working with Oracle databases from 10g-r1 to 11g-r2. They are set as ISO-8859-15 (WE8ISO8859P15) character set. I need to create a tablespace set as UTF-8 (AL32UTF8) character set inside these ...
7
votes
2answers
1k views

If I SET ARRAYSIZE 1 in SQL*Plus, the records are still fetched in pairs. Why?

I thought about writing a simple tail -f like utility to "trace" the progress of some figures within the database: create or replace function tail_f return varchar2_tab pipelined as n number; ...
5
votes
1answer
647 views

Silent truncation of last character when using SSIS with Oracle

I am using SSIS to export data from an Oracle database. Sometimes when I export a VARCHAR2 column to NVARCHAR the last character gets truncated (silently). It's completely random as far as I can tell. ...
3
votes
1answer
968 views

Oracle RAC on Virtual machine

I have Oracle RAC on the very powerful servers and it can be said that these servers have extra memory,cpu and storage :) ...so my servers are much more powerful than it is needed. My manager 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 ...
4
votes
1answer
143 views

Rank Partition?

I have a table which holds customer information with an Account state (working or Deactivated) for every single day. I'm trying to reduce this information by showing start and end dates for the ...
2
votes
1answer
443 views

Error creating linked database to oracle

CREATE DATABASE LINK myLINK CONNECT TO username IDENTIFIED BY password USING 'PROD'; OPT= (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.6.1.5)(PORT = 1521)) ) ...
9
votes
4answers
31k views

Execute a script with SQLPlus containing blanks, semi-colons, and forward slashes

Occasionally I will get a script that will run fine in SQL Developer or Toad, but requires modification in order to be run successfully from SQL*Plus. Here is a worst case example containing multiple ...
1
vote
2answers
1k views

Commercial database systems versus open source database systems [closed]

Can anyone tell me what are the reasons for buying a commercial database system and not using an open-source free version? The reason for my question is that: Commercial systems cost upwards of ...
2
votes
2answers
11k views

Reduce Size of SYSAUX

I am trying to reduce the size of our SYSAUX Table. Currently the largest four occupants are below. As you can see it is mostly the Server Manageability items. select occupant_desc, ...
0
votes
1answer
274 views

How do oracle date time work?

I have following where condition in query. What the time is between T1 and T2 means it includes or excludes the boundary. Also between T1 and T1 means what?I am confused as both returns result. ...
2
votes
2answers
2k views

How do I recreate a deleted logfile on an Oracle database?

For my database assignment we were looking into "database corruption". I was asked to delete the second redo log file, which I have done with the command: rm log02a.rdo this was in the ...
6
votes
1answer
22k views

How to free up disk space? which logs/directories to clean?

I want to free up the disk space on my Linux machine. I've drill down the space usage and found that the following directories have a big size /u01/app/11.2.0/grid/cv/log ...
3
votes
1answer
1k views

Oracle explain for cascading delete is wrong

My deletes in Oracle 11 are very slow. The tables are linked by foreign keys and every foreign key constraint has a delete cascade set on it. If I hit the explain button on a statement like this ...