A very nice question. I learned something again.

Nice question, good explanation. If i will ever have use of it, i don't know. 😉

Thanks, but easy! 😛

2 points for so an easy question? Nice! 😀

The space used to store nullable fields is the only bottleneck. I missed it. :w00t:

First thought, ehh.. 😀

Today we learned a way how not to solve such kind of tasks. 😀

Easy point! 🙂

Thanks, now it's clear that my english has to be improved. 😀

Hmmmm.

I used the same source (http://en.wikipedia.org/wiki/Database_normalization) i hope (because the link provided on the result page isn't existing), and there is a definition: A prime attribute, conversely, is...

That was a nice question. But in production code i would have used paraenthesis for better readability. 😛

Failed (before coffee :doze: ). Urrrggghhh...

Nice question! Thanks!

1. It wasn't against you, i'm sure, everyone who sends a snippet for selection is doing tests before.

But it should be selfmandatory for the editor to test if something has...

A typo again, and again, and again.

How many should we report to get someone control the code before posting?:-D