date_extract_ss
Extract the second from the date as an integer
Examples:
date_extract_ss(to_fixed_timestamp('2017-12-13T00:24:53Z'))
-- Result: "53"
date_extract_ss(to_floating_timestamp('2017-12-13T8:24:53'))
-- Result: "53"
date_extract_ss(to_fixed_timestamp('2017-12-13T00:24:53+0930'))
-- Result: "53"
a -> number