GARYWC wrote:

How can I convert "2015:12:25 14:01:38" and "2015:12:25 14:43:31"
(format: ccyy:mm:dd hh:mm:sec) to a serial numbers?

How do I compare the resulting serial numbers to find the lowest serial
number?

First explain what you want when you say "serial number".

As for finding the lowest, you could possibly use the MIN or MINA functions,
depending on your needs.

--
That's the problem with nature, something's always stinging you or
oozing mucous all over you. Let's go and watch TV.
-- Calvin