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

Instead of using GROUP BY, make a table (perhaps a temporary table) which contains the specific dates you want, for example:

24 Dec
23 Dec
22 Dec
21 Dec
20 Dec

Then, join that table to the Orders table.