How do you select a date range in postgres?

Question

I have a timestamp field in a postgres database. I would like to select all dates that have happened within the last month. So something like select * from table where time

Answer 1

To be precise:

SELECT *
FROM   tbl
WHERE  ts_col >  now() - interval '1 month'
AND    ts_col <= now();

Answer 2

select * from table where timestamp > now() - interval '1 month'