Why I use UUIDs for primary/foreign keys

[eluser]jedd[/eluser]

@Jedd, UUID digits are hexdecimal so I have no clue why you have “S” and “Y” in your examples.
It saddens me to see that people who have no understanding of a subject make such strong negative argument. It makes us all look silly.
Do some research yourselves or would you like to let me google that for you?

I did a fair bit of research on these about four years ago, after some lengthy discussions with the aforementioned friend.

Didn't notice the S and Y in there - I just cut-and-pasted from the earlier examples. You're right, though. I should have taken far more care when examining those strings to make sure they were hexadecimal, but, you know how it is when you're in a hurry and the presence of an S or a Y isn't really germane to the point you're making, rather it's the relative length and complexity of the string.

But thanks for your constructive comments here, and I'm sorry there was nothing of actual substance in my message that you thought warranted a comment.

EDIT - Actually I should have also removed the dashes from the strings (as they are also not hexadecimal characters) but since they were cited in the original post, I assumed they were, also, some valid variation of the same basic thing. I'm surprised you didn't pick up on this stunningly important detail.
EDIT #2 - Oh heck. I just noticed that I also left an R in my cut-n-paste from the OP's message. I feel extra clueless now. I can only begin to imagine how sillier that makes everyone else look.