SELECT UNIX_TIMESTAMP(),UNIX_TIMESTAMP('20100101000000'),UNIX_TIMESTAMP()-UNIX_TIMESTAMP('20100101000000'),FROM_UNIXTIME(UNIX_TIMESTAMP('20100101000000')+ROUND(RAND()*(UNIX_TIMESTAMP()-UNIX_TIMESTAMP('20100101000000'))))
SELECT UNIX_TIMESTAMP(),UNIX_TIMESTAMP('20100101000000'),UNIX_TIMESTAMP()-UNIX_TIMESTAMP('20100101000000'),FROM_UNIXTIME(UNIX_TIMESTAMP('20100101000000')+ROUND(RAND()*(UNIX_TIMESTAMP()-UNIX_TIMESTAMP('20100101000000'))))
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580
1703
439
512

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