DBA Blogs

Partner Webcast – Oracle Data Visualization Wins against Competition

How do we turn data into insights? Can your business users create their own analyses and present these as dynamic visualizations to their colleagues? With Oracle Data Visualization Desktop you can...

We share our skills to maximize your revenue!
Categories: DBA Blogs

Oracle External Table ODCIEXTTABLEOPEN error while selecting count(*) of the table

Tom Kyte - Sat, 2016-06-25 04:06
Hi I am explaining from beginning, My Server is : UNIX BOX (HPSA) I have created the below folder in this UNIX server and folder permissions are mm13pb:/ $ ls -ltr drwxr-xr-x 7 root root 4096 Dec 15 2013 data mm13p...
Categories: DBA Blogs

Unused Index(s) for a specific Time?

Tom Kyte - Sat, 2016-06-25 04:06
<code>Hi Tom, I want to drop those indexes which are not used in the last 2 months so to reclaim space. For example There are two indexes on scott.emp on the empno and the other is on deptno. While the application is only using empno index but no...
Categories: DBA Blogs

SP2-0734 when try to execute line begins with "#" character

Tom Kyte - Fri, 2016-06-24 09:46
Hi, I need to execute script (package body) that contents a line with first character "#", for example: ... ... htp.p(' <script> <style> #tbTabs tr td table Port ... ... When execute line "#tbTabs tr td table Port", this raises the error:...
Categories: DBA Blogs

...

Tom Kyte - Fri, 2016-06-24 09:46
...
Categories: DBA Blogs

Confusing Genesis of Cursor

Tom Kyte - Fri, 2016-06-24 09:46
Hi Connor I am going through the book "Troubleshooting Oracle Performance" by Christian Antognini. The definition below are confusing. Open cursor :- A memory structure for the cursor is allocated in the server-side private memory of the ser...
Categories: DBA Blogs

Merge statement.

Tom Kyte - Fri, 2016-06-24 09:46
We have two tables A, B. in A table ID is matching columns in bother the tables. ID REF NO NAME 0434 98 93 ABC 0423 18 61 XYZ 4875 474 45 tyh In B t...
Categories: DBA Blogs

Role of undo in instance recovery

Tom Kyte - Fri, 2016-06-24 09:46
Hi Tom, I have a doubt regarding the role of undo segments in instance recovery, it is clear that the roll forward operation also generates the undo segments in the undo tablespace but I want to understand from where it gets the past image of the ...
Categories: DBA Blogs

Creating triggers on (tables in) another schema

Tom Kyte - Fri, 2016-06-24 09:46
In Oracle you can have triggers owned by schema x on tables of schema y. Unfortunately there seems to be no fine grained way to authorize this - user x needs CREATE ANY TRIGGER privilege. (contrary to the similar situation with indexes, user y can...
Categories: DBA Blogs

read consistency how to maintain which update record

Tom Kyte - Fri, 2016-06-24 09:46
hi can you explain when one update statement access a record and select statement want to access the same record , lets assume update takes 10 min(till not committed). what will happen to select statement. select statement can access previous image...
Categories: DBA Blogs

Top N order by query is slow

Tom Kyte - Fri, 2016-06-24 09:46
Hi Tom, I'm trying to retrieve the last 20 rows by time for users with more than 100K rows in a table with more than 1 million records. The query performance is fine (in ms) when the user has a small number of records. But takes more than 2 minute...
Categories: DBA Blogs

Training On-demand: Fusion Middleware for Implementation Specialists

In conjunction with our colleagues from Global enablement we are pleased to offer training on Demand Boot Camps for Oracle Fusion Middleware partners, these three market leading products Oracle SOA...

We share our skills to maximize your revenue!
Categories: DBA Blogs

Exadata and Big Data Implementation Specialists Bootcamps

In conjunction with our colleagues from Global enablement we are pleased to offer training on Demand Boot Camps for Exadata and Big Data to Oracle key partners in EMEA. These cutting edge products ...

We share our skills to maximize your revenue!
Categories: DBA Blogs

Links for 2016-06-23 [del.icio.us]

Categories: DBA Blogs

Unable to Retrieve sys_refcursor values from remote function

Tom Kyte - Thu, 2016-06-23 15:09
Hi, i have created a function in DB1 that returns a sys_refcursor as output which is giving the result as desired in DB1. But when other database DB2 is trying to execute the function using dblink, that cursor is not returning any values. It is no...
Categories: DBA Blogs

Want to skip record if it's length not matching with required length while loading data in oracle external table

Tom Kyte - Thu, 2016-06-23 15:09
Hi Tom, I want to load data from fixed length file to oracle external table. I have specified length for each column while creating external table so data for most records getting loaded correctly. But if record length dosent match then data gets...
Categories: DBA Blogs

how to use Connection String in VB.NET using Oracle Wallet ?

Tom Kyte - Thu, 2016-06-23 15:09
In vb.net we could use following connection string but i recently do practical on oracle wallet done successfully in SQL PLUS Tools but main question is i want to use this connection string (username and password and tnsping) using oracle wallet sto...
Categories: DBA Blogs

Tree and "Youngest Common Ancestor"

Tom Kyte - Thu, 2016-06-23 15:09
<code>Hello Tom, I could finally ask you a question... I have a table like this: create table tree(name varchar2(30), id number, pid number, primary key(id), foreign key(pid) references tree(id)); with sample data: insert into tree va...
Categories: DBA Blogs

Pages

Subscribe to Oracle FAQ aggregator - DBA Blogs