Oracle Database is one of the leading relational database management system and is used all over the world. It has various training’s, exams and certifications for its Database and other products. However due to regular update in Database, they have to redesign their trainings, certification and exams to add new features and to remove old […]
The post Oracle Database 10g Certifications to Expire in March 01, 2015 appeared first on VitalSoftTech.
One annoying thing from installing Oracle Database 11g on Fedora, was that the up arrows for command history didn’t work. I decided to fix that today after seeing Lutz Hartmann’s article on
rlwrap. Unfortunately, the
epel (Extra Packages for Enterprise Linux) package he recommended doesn’t run on Fedora 20. You can read my tale of woe, or skip to the
.bashrc function that fixed it when I installed only
Attempting it on
The ability to deploy Java inside the Oracle database led somebody to conclude that the source isn’t visible in the data catalog. Then, that person found that they were wrong because the Java source is visible when you use a DDL command to
COMPILE the Java source. This post discloses how to find the Java source and how to prevent it from being stored in the data catalog.
For example, (more...)
I left to chance where students would attempt to place their external files in a Linux or Unix implementation. As frequently occurs, they choose a location in their
student user’s home directory. Any attempt to read an external table based on a file in this type of directory fails because it’s not accessible by the Oracle user. You can’t simply
chown the directory and files in the directory.
The failure returns the following result:
Being a huge fan of Logger, the PL/SQL logging utility, I really wanted this be to included in the project that I'm currently working on. So I downloaded it (link at the bottom of this blog) and included it in our deployment scripts. Done.... at least I thought so, but of course this wasn't the case.
The regular install script for Logger looks something like the following (parts removed and table names are changed):
The PIVOT and UNPIVOT operators were introduced in Oracle 11g and the other day I helped out a friend using these operators.
He wanted the data in the columns to be "shifted to the left". To explain a little more, take a look at the following data:
ID V1 V2 (more...)
Last week I reviewed “Oracle Database XE 11gR2 Jump Start Guide” (Packt Publishing, 2012) in this post. Packt guys did like the review, and today I am pleased to announce that I will be giving away two free e-copies of the book. All you need to do is just comment below the post and win [...]
About a year ago Packt Publishing approached me and offered to write a book on (one of the technologies in) Oracle 11g. After careful consideration I had to decline the offer. Which was the right decision as I have hardly had any spare time in the past 12 months. However, Packt guys have kept in [...]
I have extended the Undo usage scripts to include two additional indicators:
1) undo change vector size statistics
2) Used undo records/blocks
and support for RAC infrastructure, so you can spot the hungriest UNDO eaters for any given instance.
Then the script for Oracle 11g is as follows:
set pagesize 400
set linesize 140
col name for a25
col program for a50
col username for a12
col osuser for a12
SELECT a.inst_id, a.sid, c.username, c.osuser, c.program, b.name,
a.value, d.used_urec, d.used_ublk
FROM gv$sesstat a, v$statname (more...)
Some time ago, if you said you had installed Linux and, heavens forbid, Oracle on Linux, you’d be considered an utter geek. Fast forward 15 year. These days, when people (who have experience with other databases and operating systems) ask me about Oracle/Linux, I feel somewhat embarrassed. Let me illustrate what I mean. Install Oracle [...]
When you have two Oracle databases and want to exchange data between them, it is easily done via database links. So for your local database you would go select * from local_table and for the remote one select * from remote_table@link_to_remote_db But what if the remote database isn’t Oracle, what if it’s (for example) Microsoft [...]
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Sorry I’ve been having a lot of work installing, maintaining and migrating to Database Machines all over Latinamerica for the latest 10 months; that means lot of travels abroad, all of them very exciting, but the real excitement comes from my job working with this wonderful Machine.
Was on the last project when realized how important is this investment for our customers, having this big caribbean Telco installed their first Exadata and later migrated their databases meant for them dramatic performance improvements and the ability to get more up-to-date analytical information and compete (more...)
Last week’s article on 1Z0-058 questions was quite popular, more popular than I expected. So if you enjoyed the questions, now it’s time to get some answers! (1) Kevin is a database administrator at Fictional Real Estate Co. All he hears everyday is location, location, location. He is asked by one of the Sales team [...]
If you get emails from Oracle University, you might have received a notification that 1Z1-058 (1Z0-058 beta) “Oracle 11g R2 RAC Administration” exam is now available. It earns you an 11g R2 RAC Oracle Certified Expert (OCE), but you need to be an 11g DBA Oracle Certified Professional (OCP) first to get that. If you [...]
A couple of weeks ago we talked about Flash on Android via Oracle APEX. Today let’s check the competitor’s offer. Unfortunately Apple products don’t support Flash. The good news however is that they do support SVG, as do most web browsers (IE7/8 is pluginable and IE9 is going to support it properly). I first came [...]
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Last time I was engaged with an Exadata migration, customer asked me about EHCC and how to implement it for their datamarts.
My approach (at that time) consisted on the following:
1) Get a sample of very big objects to play with
2) Used DBMS_COMPRESSION in order to get estimations for compression rates
3) Try every compression type: Basic, Query Low, Query High, Archive Low, Archive High and recorded size reductions, time to import and time for FTS.
4) Recorded and compared timings for various batch processes and (more...)