SQL group by date, but get dates w/o records too

Question

Is there an easy way to do a GROUP BY DATE(timestamp) that includes all days in a period of time, regardless of whether there are any records associated with th

Answer 1

There's a pretty straightforward way to do this… except that I can't remember it. But I adapted this query from this thread:

SELECT 
    DISTINCT(LEFT(date_field,11)) AS `Date`,
    COUNT(LEFT(date_field,11)) AS `Number of events`
FROM events_table
GROUP BY `Date`

It works in MySQL too