I need to generate an 12-digit unique/random

Randomness is... just random, so you may get random duplicates with whatever random technique. Probability may vary.

--shmem 

_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}

In reply to Re: Question: Generate unique/random 12-digit keys for 25,000K records, howto?? by shmem
in thread Question: Generate unique/random 12-digit keys for 25,000K records, howto?? by lihao

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