Question

I have this query… I want to have the current date minus the weekday to get the date for all mondays. however since current_date is a date and DOW is double I’m getting an error

select extract(day from(current_date)) - extract(dow from current_date)

thanks

Answer 1

I don’t get an error in 9.2. Anyway it will fail for the first days of the month:

select extract(day from '2013-02-01'::date) - extract(dow from '2013-02-01'::date);
 ?column? 
----------
       -4

The correct way:

select date_trunc('week', '2013-02-01'::date);
       date_trunc       
------------------------
 2013-01-28 00:00:00-02
(1 row)