"I want a foreign key that can point to columns in two or more tables, and have a value from one OR another, yet still have its constraints enforced - why can't I specify e.g. A(X) REFERENCES C(Y) OR D(Z), so that A(X) may be a value from either C(Y) or D(Z), but nothing else?"
"you don't have to have an operator to alter a column's datatype: you just create the new column, copy the data into it, and then drop the old column, all within a single transaction, and if you screw up you can roll the whole thing back"
Actually, from PostgreSQL 8 you can use ALTER TABLE.
Yes, so the languages are mostly crappy, but I can see quite a few good books:
* Lucid Dreaming is not academical or, in many people's opinion, useful, but it's pretty polished.
* High School Extensions (for Mathematics) has only a few chapters done out of the 8 or so outlined, but the ones done are of very high quality (well, grammar and spelling isn't perfect, but it's passable)
* The Cookbook has plenty of recipes, although the structure is lacking (I think)
Which kernel do I want? gentoo-sources-2.6 of course. 2.6 because, for example, it does ALSA by default.
Do I menuconfig or do I genkernel? I tried menuconfig once, but from now on I'm using genkernel. menuconfig is *such* a pain and if you find you didn't compile something you needed, you'll need to recompile. (somebody will probably reply explaining how to compile a component seperately as a module, but never mind). Genkernel builds too much for your system (i.e. it takes ages) but it's simpler.
Syslogger and cron? I have no idea. I followed the recommendations. I haven't looked at any system logs and I haven't set up any cronjobs.
That's all I can say. See? Your choices are made for you! Actually, you need to pick a filesystem and partition your disk. That's simple though.
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Actually, from PostgreSQL 8 you can use ALTER TABLE.
There already are third-party plugins. Check the W3C XForms website.
there -> their, Your -> You're, its -> it's
;)
Yes, it is anoying!
They also need to decide whether the array functions return the new array or transform the array passed. This is what really always pisses me off.
Note: Linux port-in-making has only 8 levels while the Windows version (does not work in wine) has over 70.
Note: Extremely hard puzzle game, more for the adults than the children ;-).
FPFPFP!
So great :D Mod up.
I look forward to reading the source code of Solitaire.
Yes, so the languages are mostly crappy, but I can see quite a few good books:
* Lucid Dreaming is not academical or, in many people's opinion, useful, but it's pretty polished.
* High School Extensions (for Mathematics) has only a few chapters done out of the 8 or so outlined, but the ones done are of very high quality (well, grammar and spelling isn't perfect, but it's passable)
* The Cookbook has plenty of recipes, although the structure is lacking (I think)
* There are plenty of German books
* XML is going along nicely
Which kernel do I want? gentoo-sources-2.6 of course. 2.6 because, for example, it does ALSA by default. Do I menuconfig or do I genkernel? I tried menuconfig once, but from now on I'm using genkernel. menuconfig is *such* a pain and if you find you didn't compile something you needed, you'll need to recompile. (somebody will probably reply explaining how to compile a component seperately as a module, but never mind). Genkernel builds too much for your system (i.e. it takes ages) but it's simpler. Syslogger and cron? I have no idea. I followed the recommendations. I haven't looked at any system logs and I haven't set up any cronjobs. That's all I can say. See? Your choices are made for you! Actually, you need to pick a filesystem and partition your disk. That's simple though.