How do you select a date range in postgres?

问题

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 timestamp > (current timestamp - 1 month).

回答1:

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

回答2:

To be precise:

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

来源：https://stackoverflow.com/questions/10942219/how-do-you-select-a-date-range-in-postgres