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August 2015

Navigating the world of Oracle database documentation

If you head on over to http://docs.oracle.com/en/database/ you’ll be both amazed and dismayed by the volume of documentation you can find about the database.  If you’re a seasoned Oracle professional, then you probably dont think twice about finding PIVOT examples in Chapter 18 of the Data Warehousing guide Smile

But for the novice, whether it be DBA or Developer, it can be a bit overwhelming.  One resource that you might find a useful addition to your navigation of the Oracle universe, is the interactive quick reference site.

CloneDB in Oracle 12.1.0.2

I personally really like CloneDB, a way to thin-clone an Oracle database over NFS. This can be quite interesting, and I wanted to update my blog for 12.1.0.2.3 (April PSU). Tim Hall has a good example for 11.2.0.2 and later with further references.

My setup is as follows:

Upcoming Raspberry Pi Family Coding Day Project

I’ve had a lot of people email and message me asking me what I’m doing with the Raspberry Pi and I wanted to share before the actual RMOUG Quarterly Education Workshop, (QEW) this Friday at Elitches.

WordPress 4.2.4

wordpressBy the time you read this, you are probably auto-magically running on WordPress 4.2.4. :)

It’s a security release. You can read about the changes here.

Have a good time sitting back and doing nothing while it takes care of itself! :)

Cheers

Tim…

The Proliferation of I.T. Voodoo…

When I say “voodoo” in this context, I’m really talking about bullshit explanations for things based on guesswork, rather than reasoned argument built using facts and investigation.

It’s really easy for voodoo explanations to proliferate when people are starved of facts. There are several ways this can happen, but a couple of them that spring to mind and really piss me off are:

On the Topic of Technology… 8 – First 48 hours with Windows 10

August 3, 2015 (Updated August 5, 2015, August 10, 2015, August 29, 2015) (Back to the Previous Post in the Series) I have been testing Windows 10 under the Windows Insider Program for several months using an old Dell Precision Core 2 Extreme computer (with NVidia graphics card) that was retired from engineering service a […]

OTN Tour of Latin America 2015 : UYOUG, Uruguay – Day 1

After 15 hours of sleep I still managed to feel tired. :) I went for breakfast at 6:30, then started to feel a little weird, so I took some headache pills and headed back to bed for a hour before meeting up with Debra and Mike to head down to the venue for the first day of the UYOUG leg of the tour…

The order of events went like this:

Provisioning Virtual ASM (vASM)

Create vFileshttp://cdn2.oraclealchemist.com/wp-content/uploads/2015/08/add_vfiles-30... 300w, http://cdn3.oraclealchemist.com/wp-content/uploads/2015/08/add_vfiles.pn... 1054w" sizes="(max-width: 840px) 100vw, 840px" />

In this post, we’re going to use Delphix to create a virtual ASM diskgroup, and provision a clone of the virtual ASM diskgroup to a target system. I call it vASM, which is pronounced “vawesome.” Let’s make it happen.

Demo data

One of the articles I wrote for redgate’s AllthingsOracle site some time ago included a listing of the data distribution for some client data which I had camouflaged. A recent comment on the article asked how I had generated the data – of course the answer was that I hadn’t generated it, but I had done something to take advantage of its existence without revealing the actual values.  This article is just a little note showing what I did; it’s not intended as an elegant and stylish display of perfectly optimised SQL, it’s an example of a quick and dirty one-off  hack that wasn’t (in my case) a disaster to run.

I’ve based the demonstration on the view all_objects. We start with a simple query showing the distribution of the values of column object_type:

OTN Tour of Latin America 2015 : The Journey Begins – Arrival at Montevideo, Uruguay

ace-directorAfter the quick flight to Montevideo, I was met by Edelwisse and Nelson. A couple of minutes later Mike Dietrich arrived. You know, that guy that pretends to understand upgrades! We drove over to the hotel, arriving at about 11:00. Check in was not until 15:00, so I had to wait a few minutes for them to prep my room. The others were going out to get some food, but I had a hot date with my bed. I got to my room, showered and hit the hay.