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What Day Is It If You Only Specify The Time?

What is the date if you only specify the time when you populate an Oracle date column (or variable)?

That was the question that came up a few days ago in the little DBA team I am currently working in. Of course, the question was posed by the “junior” (who is damned smart at this stuff as he keeps asking questions like that) and the answer from us two old hands was… “Ohh!… hang on… errr….”

A little discussion then occurred. One of us suggested it would be “today”. One of us suggested it would be the Julian 1 date (4712BC). Both of us then stated it was an easy thing to test and the PROPER answer was “just try it and then you will know for sure”. We were right {and, of course, wrong} – as in with a simple question like this you don’t need to google the question (so “hello” to anyone googling the question and finding this page!) you just try it:

The junior tried it and…

Friday Philosophy – Is Dave Working?

Is Dave across the desk from you working at the moment? Or is he goofing off? You can’t see his screen but I reckon you can make a fair stab at what he is up to, without recourse to any sort of IT monitoring systems at all. How?

How fast is Dave typing?

If Dave is typing fast, he is almost certainly not working. He’s goofing. There are very few things you can do when you work in IT where you type fast – and especially not type fast for more than a few seconds. If Dave is typing fast he is almost certainly emailing a mate or instant-messaging Sandra in the development team. If Dave is typing fast, pausing for a few seconds and then typing fast again, he is *certainly* conversing electronically with a friend. This will be 100% corroborated if he smiles, sniggers, smirks, laughs or just glances around furtively.

Friday Philosophy – Network to Work or Work to Network?

A couple of months ago my friend Big Dave Roberts blogged about the benefits of networking – as in social/business networking as opposed to using hairy string to connect bits of IT kit together – after we had met for a drink in Birmingham.

His point was that, though he had made a positive effort to network more to help his career (along with several other steps) networking had not in fact, as far as he could tell, helped his career. But he still did it because of the other benefits – meeting diverse people with different experiences and ideas and enjoying it.

Re-forming the Martin Cluster in Norway

Later this month, on April 17-20th, I am presenting again at the Norwegian Oracle user group (OUGN) spring conference {modern browsers will allow you to translate any Norwegian if you need to} . I loved it last year, as you can see from my third-day post on it. I’ve been lucky to attend some very good conferences over the last few years but those three days at the OUGN conference last year were, I think, my favourite single event to date. If you are within striking distance of Oslo and can negotiate the time out of the office, I would strongly recommend the event. If you can’t negotiate the time, heck, take a holiday and go anyway :-)

Friday Philosophy – Level of Presentations

This FF is a bit of a follow-up to the one I posted last week on PL/SQL skills and a comment made by Noons on how much knowledge you need to be an OakTable member.

I have a question to answer and I would appreciate other people’s opinion. Should there be more intro talks at conferences? If so, should the experts be giving them?

Friday Philosophy: It’s Not What you Know – It’s What you are Getting To Know.

This has been a good but tiring week. It started with the UKOUG TEBS conference where I saw lots of people I know, a few who I didn’t but now do and I had good times in pubs and restaurants. One evening culminated in my singing part of “Two out of Three ain’t bad” in the style of a munchkin with Nial Litchfield in a pub at 1am, which I am sure he woud rather forget about – so if you know him, ask him about it. For me that was the indicator to go lie down in the dark and sleep. Irrespectve of drunken singing, I must had talked about 20 topics with 40 people over the conference, exchanging ideas, tricks and war stories.

Friday Philosophy – The Tech to Do What You Need Probably Exists Already

How many of you have read the Oracle Concepts manual for the main version you are working on?

This is a question I ask quite often when I present and over the last 10 years the percentage number of hands raised has dropped. It was always less than 50%, it’s been dropping to more like 1 in 10 and Last year (at the UKOUG 2011 conference) was the nadir when not a single hand was raised. {Interestingly I asked this at the Slovenian User Group 3 months ago and something like 40% raised their hand – impressive!}.

Friday Philosophy – The Importance of Context

A couple of weeks ago I was making my way through the office. As I came towards the end of the large, open-plan room I became aware that there was someone following behind me so, on passing through the door I held it briefly for the person behind me {there was no where else they could be going}, turned left and through the next door – and again held it and this time looked behind me to see if the person was still going the same way as I. The lady behind gave me the strangest look.

The strange look was reasonable – the door I’d just held for her was the one into the gentleman’s bathroom. *sigh*

Friday Philosophy – Is the CBO becoming way too complex?

I was at the SIOUG annual conference in Slovenia this week (and a very good conference it was too) and I was watching a presentation by Christian Antognini about how the CBO learns by it’s mistakes. This was of course mostly about adaptive cursor sharing and cardinality feedback. Chris was also able to share a few tid-bits about 12c enhancements in this area. I can’t go into details, but basically it looks like the CBO is going to not only enhance those two features but there is a new one where the CBO can change the plan on the fly, as the same query progresses.

Friday Philosophy – I Am An Exadata Expert

(Can I feel the angry fuming and dagger looks coming from certain quarters now?)

I am an Exadata Expert.

I must be! – I have logged onto an Exadata quarter rack and selected sysdate from Dual.

The pity is that, from some of the email threads and conversations I have had with people over the last 12 months, this is more real-world experience than some people I have heard of who are offering consultancy services. It’s also more experience than some people I have actually met, who have extolled their knowledge of Exadata – which is based solely on the presentations by Oracle sales people looking at the data sheets from 10,000 feet up and claiming it will solve world hunger.

Heck, hang the modesty – I am actually an Exadata Guru!