postgres last month code example

Example 1: last 6 months postgresql

CURRENT_DATE - INTERVAL '6 months'

Example 2: postgresql get last day of month

create function end_of_month(date)
returns date as
$$
select (date_trunc('month', $1) + interval '1 month' - interval '1 day')::date;
$$ language 'sql'
immutable strict;