PostgreSQL date addition and subtraction

In PostgreSQL, you can directly add and subtract time:,

SELECT now()::timestamp + '1 year'; -- add 1 year to the current time

SELECT now()::timestamp + '1 month'; --Add one month to the current time

SELECT now()::timestamp + '1 day'; -- current time plus one day

SELECT now()::timestamp + '1 hour'; -- add one hour to the current time

SELECT now()::timestamp + '1 min'; -- add one minute to the current time

SELECT now()::timestamp + '1 sec'; -- add one second

select now()::timestamp + '1 year 1 month 1 day 1 hour 1 min 1 sec'; -- add 1 year 1 month 1 day 1 hour 1 minute 1 second

SELECT now()::timestamp + (col || ' day')::interval FROM table -- convert the col field to days and add them together