Function UNIX_TIMESTAMP generates output in seconds, i.e. this function converts the specified date or datetime value into a total number of seconds.
For example, the date '1970-05-15 05:04 :30' will be converted to a total of 11576070 seconds by the UNIX_TIMESTAMP function.
mysql> select UNIX_TIMESTAMP('1970-05-15 05:04:30'); +---------------------------------------+ | UNIX_TIMESTAMP('1970-05-15 05:04:30') | +---------------------------------------+ | 11576070 | +---------------------------------------+ 1 row in set (0.09 sec)
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