SECOND

expression

An expression that returns a value of one of the following built-in data types: a time, a timestamp, a character string, a graphic string, or a numeric data type.

• If expression is a character or graphic string, it must not be a CLOB or DBCLOB, and its value must be a valid string representation of a time or timestamp. For the valid formats of string representations of times and timestamps, see String representations of datetime values.
• If expression is a number, it must be a time duration or timestamp duration. For the valid formats of datetime durations, see Datetime operands and durations.

The result of the function is a large integer. If the argument can be null, the result can be null; if the argument is null, the result is the null value.

The other rules depend on the data type of the argument:

• If the argument is a time, a timestamp, or a valid character-string representation of a time or timestamp:

  The result is the seconds part of the value, which is an integer between 0 and 59.

• If the argument is a time duration or timestamp duration:

  The result is the seconds part of the value, which is an integer between -99 and 99. A nonzero result has the same sign as the argument.