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161 - Christmas break
For the next 10 days, I'm taking a Christmas break from Open Source training. A time with friends and family and recharging batteries ... although I'm sure that I'll be on line from time to time. Posts to "The Horse's Mouth" will be less frequent until the New Year - it's just not the season that mo ....

160 - Review of the Autumn
This has been a very busy Autumn for Well House Consultants. In October, Lisa and I took a week away from presenting courses to attend a conferenece with speakers including the originators of Perl, PHP and MySQL ... yet still our October business level didn't dip. November was our best month ever, a ....

159 - MySQL - Optimising Selects
If you're going to be doing a complex select in MySQL, how should you formulate it to make it run efficiently? This sounds like a simple question, but is actually very complex! Firstly, consider creating indexes on any columns that are likely to be used in the selection of joining of records; choo ....

158 - MySQL - LEFT JOIN and RIGHT JOIN, INNER JOIN and OUTER JOIN
In a database such as MySQL, data is divided into a series of tables (the "why" is beyond what I'm writing today) which are then connected together in SELECT commands to generate the output required. I find when I'm running MySQL training, people often get confused between all the join flavours. L ....

157 - Automatic service upgrades
Ever bought something ... only to discover shortly thereafter that a new model was launched the following month? Isn't that irritating in the extreme? When I attended sales training many, many years back I was taught "Don't sell futures - it makes people wait for the new product and means you miss t ....

156 - Signage
As I drove up the motorway to Liverpool a couple of weeks back, I pulled into a service area and followed the "cars ONLY" sign. Another route was marked "caravans ONLY", and I found myself visualling the scene on a summer Saturday as everyone uncouples their car / caravan combos, drives the car int ....

154 - Railway train service, Melksham station
I never cease to be amazed at how little people know of the public transport that's available on their own doorstep. * Melksham station closed in the 1960s. That seems to be pretty well know locally. * It reopened in the 1980s, with a minimal service. Some people know this. * In 2001, the service ....

153 - Linux - where to put swap space
Swap Space is used on Unix and Linux systems to provide additional pseudomemory resources. In other words, if you try to run so many processes that they won't all fit into memory at the same time, the operating system will swap them in and out of the swap space. Swap space can be either disc parti ....

152 - Aladdin, or careful what you wish.
Have you heard of the Linux user called Aladdin? He came across a command called "alias" one day, and the manual told him that it would make his wishes come true - that options that he wanted to be default would be, and that he could even make up his own new commands. Aladdin felt this was too goo ....

151 - Coffee Standards
On the site on which I was working last week, there were two coffee machines, both Nescafe, both maintained by the company, and both with numeric keypads for drink selection. On one of them, 18 gave a black coffee and on the other 18 gave extra white coffee with lots of sugar. Isn't standardisation ....

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