The SECOND function returns the seconds part of a value.
The argument must be a time, timestamp, or a valid character string representation of a time or timestamp that is not a CLOB, LONG VARCHAR, or XML value. The result of the function is an integer between 0 and 59. If the argument can be null, the result can be null. If the argument is null, the result is 0.
SECOND ( expression )
SECOND(RECEIVED)The value 30 is returned.