Question

How do I select records in Postgres that have hour values greater than 00:00:00? The field type is Timestamp with time zone.

Example record:

“2012-07-30 07:00:00-07”

I need everything that is greater than 00:00:00

Answer 1

Use extract(hour from ...). See the PostgreSQL date/time functions in the user manual.

CREATE TABLE test AS SELECT TIMESTAMP WITH TIME ZONE '2012-07-30 07:00:00-07' AS tstamp;

SELECT tstamp FROM test WHERE extract(hour from tstamp) > 0;