Comments on: Epoch

By: Sokrates

Sokrates — Mon, 30 Jun 2008 14:40:22 +0000

select
extract(day from (from_tz(cast(current_timestamp as timestamp), sessiontimezone) at time zone ‘UTC’ -timestamp ‘1970-01-01 00:00:00 +00:00′))*86400+
extract(hour from (from_tz(cast(current_timestamp as timestamp), sessiontimezone) at time zone ‘UTC’ -timestamp ‘1970-01-01 00:00:00 +00:00′))*3600+
extract(minute from (from_tz(cast(current_timestamp as timestamp), sessiontimezone) at time zone ‘UTC’ -timestamp ‘1970-01-01 00:00:00 +00:00′))*60+
extract(second from (from_tz(cast(current_timestamp as timestamp), sessiontimezone) at time zone ‘UTC’ -timestamp ‘1970-01-01 00:00:00 +00:00′)) n
from dual

By: Raj Jamadagni

Raj Jamadagni — Fri, 27 Jun 2008 17:37:40 +0000

I needed to do this recently so i did,


select ((to_date(to_char(sys_extract_utc(systimestamp),'yyyymmddhh24miss'),'yyyymmddhh24miss')
                    - to_date('01-JAN-1970','dd-mon-yyyy'))*86400 * 1000)
from dual
/

it was a plsql block and milliseconds from epoch at UTC were needed to construct a JSON message to be sent via utl_tcp.