MySQL DateTime instance can be converted to seconds via UNIX_TIMESTAMP() function as follows -
mysql> Select UNIX_TIMESTAMP('2017-05-15 04:05:30') AS 'NUMBER OF SECONDS'; +-------------------+ | NUMBER OF SECONDS | +-------------------+ | 1494801330 | +-------------------+ 1 row in set (0.00 sec)
The above query will convert the given datetime instance to total seconds .
mysql> Select UNIX_TIMESTAMP(NOW()) AS 'NUMBER OF SECONDS'; +-------------------+ | NUMBER OF SECONDS | +-------------------+ | 1509248856 | +-------------------+ 1 row in set (0.00 sec)
The above query will convert the current DateTime instance into total seconds.
mysql> Select UNIX_TIMESTAMP(Dateofreg) AS 'NUMBER OF SECONDS' from testing where StudentName = 'Gaurav'; +-------------------+ | NUMBER OF SECONDS | +-------------------+ | 1509247113 | +-------------------+ 1 row in set (0.00 sec)
The above query will convert a DateTime instance which is a stored value in table "testing" where column StudentName has the value "Gaurav".
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