A Book on Oracle 12c New features for administrators
It’s our pleasure to announce the availability of our first book – OCP 12c upgrade 1Z0-060 Exam Guide
The book covers the new features of the Oracle Database 12c for the DBAs from the OCP 12c upgrade exam standpoint. Book is available WW in kindle format as well as paperback.
Link to Amazon.com (more...)
One of my customers called me up last week and said he’s been having the most peculiar problem. He created a new instance on the Microsoft Azure environment (184.108.40.206) and he can’t create new tablespace. The error he’s getting “ORA-28365: wallet is not open” and he was wondering “what gives?!”.
This is kind of an interesting issue. When someone who never heard of the wallet, looking at the message doesn’t mean anything reasonable. (more...)
Just letting people in DFW area know that I’m speaking at the DOUG Performance & Tuning and 12.2 New Features Technical Day!
- Thursday 20 October 2016 9:30am-5:30pm
- Courtyard & TownePlace Suites DFW Airport North/Grapevine, TX
2200 Bass Pro Court|Grapevine, TX 76051
Speakers (Seven Oracle ACE Directors!):
- I’ll speak about In-Memory Processing for Databases where I plan (more...)
I thought this illustration was an interesting view of Oracle Database 12c’s Multitenant Architecture. It posted on ToadWorld.com today in a new article by Deiby Gomez and I thought it might be interesting for others.
You can see how to provision a pluggable database in this article on provisioning a pluggable database. As always, I hope it helps.
In this post I walk through what it would take to access Oracle 12c using a spring boot application deployed to Pivotal Cloud Foundry PCF all from my Macbook Pro. Of course this can be done outside of an isolated laptop like my Macbook Pro but handy while doing DEV/TEST and still being able to use Oracle 12c.Requirements
- Oracle 12c instance
- Git Client
1. First you will need a 12c Database and the (more...)
Even though a space is a regular character, the client didn't want spaces at the beginning or end of a string. Any spaces in the middle were fine.
Of course this could be handled by the application, but it must also be implemented in the database. Using a check constraint with a regular expression will prevent the end user from entering unwanted data.
To try things out, let's just start with a simple table with (more...)
As does seem to occur from time-to-time, I’m out there in the weeds again and sorting out a solution that fits a customer’s need. They wanted to know if they could write Oracle EBS 12.2 Concurrent Manager Programs in Ruby. They don’t want to write Java.
I checked the documentation, which as is too common, didn’t answer the question. I’m sure if I downloaded the PDF and searched it for one of the (more...)
Table recovery was possible in earlier release as well. Until previous release, if we wanted to recover a table, we had following options
- Database point in time recovery (DBPITR)
- Tablespace point in time recovery (TSPITR)
- Flashback technology
In Oracle 12c, RMAN has been enhanced to perform recovery of table. We have a new command in RMAN which automates complete process of recovering the table. New process does not affect the existing objects in the database (more...)
One of the major challenge faced by an Oracle DBA is – how to effectively deal with historical data? Today, if we consider database tables for an enterprise, data in the table goes back several years and most of the data in the table is inactive. Challenge remains as to how to archive this data and make our query run efficiently.
If we choose to archive old data outside of database on a tape, cost (more...)
A question popped up, which I thought was interesting. How can you create a
DB_LINK in Oracle without the DBA changing the
tnsnames.ora file? It’s actually quite easy, especially if the DBA sets the TNS address name the same as the instance’s service name or in older databases SID value.
- Do the following with the
It should return this when the server’s
mohawk and domain name is
I am starting Oracle 12c learning series, where I am planning to publish multiple articles on Oracle 12c new features. I hope these articles will be helpful to DBAs aspiring for OCP 12c certification and also others who are planning to implement these features in there databases.
This is a very long post about ADO – Automatic Data Optimization, which is one of the ILM strategy to manage aging data. So please be patient while reading this article. This article provides end-to-end details (more...)
If you’re reading this post, you most likely are trying to run the Oracle Database 11g or 12c
runInstaller program, and it’s failing a critical dependency check and displaying an error like the one below. If so, choose
n because if you choose
y it won’t launch the Oracle Installer.
Starting Oracle Universal Installer...
Checking Temp space: must be greater than 500 MB. Actual 30824 MB Passed
Checking swap space: must be greater than (more...)
One of the new features with Oracle database 12c is the new syntax for Top N queries and pagination. Did we really need this? Should you choose for the new syntax over the way we used to do it, with an inline view? I think so, it simply adds syntactic clarity to the query, and in this blogpost I will show the difference between the "old" and the "new".
For the examples I will use (more...)
In previous articles I wrote about dealing with a missing cent when you need to divide a certain amount over multiple lines. In these articles, links are at the bottom, I described a method to calculate the difference on the last row.
Then a question arose (as a comment):
What if for example i have 42 records and i wish to divide 100 by 42. I would get a rounded value of 2.38. If (more...)
I was asked by Dan Iverson from psadmin.io
about my experiences of PeopleSoft on Oracle 12c. I have seen a number of PeopleSoft Financials systems on 12c recently. Generally the experience is very positive, but one common feature is that they had all disabled Adaptive Query Optimization.
What is Adaptive Query Optimization?
Adaptive Query Optimization is a term for a set of new features in Oracle 12c to allow the optimizer to improve the (more...)
Oracle Database 12c enables enhanced security for extproc by authenticating it against a user-supplied credential. This new feature allows the creation of a user credential and links it with a PL/SQL library object. Whenever an application calls an external procedure, the extproc process authenticates the connection before loading the shared library. The DBMS_CREDENTIAL package is … Continue reading
Recently I got involved in a question on Temporal Validity Periods together with Chris Saxon, one of the askTom-answer team.
The question was along the lines of: "What if I have a single start date but two possible end dates. One of the end dates is filled automatically by a background proces (could be a job) while the other one is to signal that the end date is set manually by the user. Could you (more...)