This how you install SQL Developer on Mac OS Yosemite. The first thing you need to do is download and install Java 8, not Java 7 on your Mac OS Yosemite, as suggested on some web sites. You can determine whether or not Java is installed by running the following command:
Mac-Pro-3:~ username$ java -version
No Java runtime present, requesting install.
You must accept the Java license to install Java 8 on the (more...)
Last week, I wrote about how to use
bash arrays and the MySQL database to create unit and integration test scripts. While the MySQL example was nice for some users, there were some others who wanted me to show how to write
bash shell scripts for Oracle unit and integration testing. That’s what this blog post does.
If you don’t know much about bash shell, you should start with the prior post to learn about (more...)
With the launch of DB 12c in 2013, Oracle introduced a new architectural concept, called “multitenant databases”, where you have one super database (=container; CDB) and one or more sub databases (= pluggable DBs; PDB).
Before running the installer on an Oracle Linux 6 environment, a library can be installed through yum to meet all the system per-requisites:
yum install oracle-rdbms-server-12cR1-preinstall
The software installer and DBCA are similar to 11g, except for this screen where (more...)
The article read most often on this blog is called "Splitting a Comma Delimited String, the RegExp way".
On this blog there are two articles about this technique, one is about splitting up a single string into multiple rows and the other is about multiple strings into multiple rows.
Links to both articles are included at the bottom of this article.
It seems like there is a need for functionality like that frequently. And just (more...)
A reader posted A dynamic level limiting hierarchical query about Oracle’s hierarchical queries. They wanted to know how to capture only the hierarchy to the level where the first leaf node occurs. They gave me the following hierarchy map as an example:
| | | |
3 5 4 6
+---------+ +-----------+ +-----+ +------+
| | | | | | | |
7 9 11 13 8 10 12 14
To refresh multiple Materialized Views you can use the DBMS_MVIEW package, with the procedure aptly named Refresh. One method is to provide a comma-separated list of Materialized View names, or you can use an DBMS_UTILITY.UNCL_ARRAY to achieve the same objective.
When using the latter method, I stumbled upon this oddity (which is not in the current documentation, or at least I couldn't find it).
The procedure that I initially wrote was the following:
Oracle Corporation has released a slew of new features that allow Oracle Database implementations to catch up to, match up to, and leave in the dust NoSQL implementations in the areas of performance, scalability, and reliability (PSR).(read more
It used to be that if you had an enhancement suggestion for Oracle Database, you had to file an enhancement request in MOS and pray that the Oracle product management gods would hear your request someday. It is now possible to make your enhancement request in a public forum and let the community vote on your idea.(read more
If you are a resident of California, you can become a member of the San Jose Public Library and gain access to Safari Books Online and Books24x7. At last count, there were 445 Oracle titles available through Safari Books Online(read more
Here are the slides of a presentation I did at the IOUG Virtual Exadata conference in February. I’m explaining the basics of some new Oracle 12c things related to Exadata, plus current latest cellsrv improvements like Columnar Flash Cache and IO skipping for Min/Max retrieval using Storage Indexes:
Note that Christian Antognini and Roger MacNicol have written separate articles about some new features:
Quite well said – Investment in knowledge is the gives you the best returns. It was a great fun last week to be the speaker at OTN Yathra 2015, organized by All India Oracle Users Group (AIOUG). The OTN tour covered seven cities and I was the part of it at three cities i.e. Hyderabad, Bangalore … Continue reading
All, Its time to be at AIOUG stage once again and the event would be the OTNYathra 2015. The event has been a great success in the past and has been able to generate/receive wide recognition and appreciation. OTNYathra focuses to evangelize the Oracle technologies to a broader and passionate audience. OTNYathra is a grand tour which is conducted … Continue reading
When you connect from ODI Studio 12c to the repository you may get error “no ocijdbc in java.library.path”. In my case I use ODI Studio 12c installed on Windows 7 64bit machine and connecting to ODI 12c linux environment. So why do I get this error?
On the same note I use Oracle JDBC Driver ODI driver connection. As the studio does not use the tnsnames to connect to the Oracle (more...)
One of the most wonderful things of Oracle Open World are the Demo-Grounds. When you want to learn more about a certain feature, this is the place to go to. The actual developers and product managers are there to answer your questions and more!
In a previous blog I had written about Temporal Validity in Oracle 12c and whether it would be possible to have multiple validity periods on one table. You can read that (more...)
This is the first entry in a series of random articles about some useful internals-to-know of the awesome Oracle Database In-Memory column store. I intend to write about Oracle’s IM stuff that’s not already covered somewhere else and also about some general CPU topics (that are well covered elsewhere, but not always so well known in the Oracle DBA/developer world).
Before going into further details, you might want to review the Part 0 of this series and also our (more...)
During a trial run for my presentation at Oracle Open World "Oracle 12c for Developers", you can find the slides on slideshare. there was a question regarding "Temporal Validity".
What is Temporal Validity?
The documentation says it best:
Temporal Validity Support lets you associate one or more valid time dimensions with a table and have data be visible depending on its time-based validity, as determined by the start and end dates or time stamps of (more...)
Despite the title, this is actually a technical post about Oracle, disk I/O and Exadata & Oracle In-Memory Database Option performance. Read on :)
If a car dealer tells you that this fancy new car on display goes 10 times (or 100 or 1000) faster than any of your previous ones, then either the salesman is lying or this new car is doing something radically different from all the old ones. You don’t just get orders of magnitude (more...)
The EOUC (EMEA Oracle User Group Community) hosts a special session on sunday during Oracle Open World. This session contains twelve things about Oracle 12c. Each of these 12 things is hosted by a different speaker, so this means that each section is only five minutes long (Strictly guarded by Debra Lilley).
Thankfully I was chosen to be one of the speaker during this special session, very excited and also very scared. (more...)
Hi there, Last week, I spoke at AIOUG Tech Day at Hyderabad. All India Oracle Users Group (AIOUG) in association with TechMahindra organized one full day of techtalk event. Believe me, the Danube auditorium was a state-of-art facility with 500 capacity. Fabulous venue and huge crowd with similar interest. I thought of sharing my experience … Continue reading
While preparing for my session at Oracle Open World on "Oracle 12c for Developers" I ran into a little remarkable thing.
When sorting a dataset, the sorting is always done last. That is what I was taught anyway. There is probably some obscure way to detect the exact execution plan, but personally I never bothered to go and investigate.
When I was created some test scripts I found there was a way to see that (more...)