PostgreSQL - GROUP BY timestamp values?

Question

I\'ve got a table with purchase orders stored in it. Each row has a timestamp indicating when the order was placed. I\'d like to be able to create a report indicating the numb

Answer 1

This does the trick without the date_trunc function (easier to read).

// 2014
select created_on::DATE from users group by created_on::DATE

// updated September 2018 (thanks to @wegry)
select created_on::DATE as co from users group by co

What we're doing here is casting the original value into a DATE rendering the time data in this value inconsequential.