Aggregating data by date in a date range without date gaps in result set

Question

I have a table with sell orders and I want to list the COUNT of sell orders per day, between two dates, without leaving date gaps.

This is what I have

Answer 1

First create a Calendar Table

SELECT coalesce(COUNT(O.*),0) as Norders, DATE_FORMAT(C.date, "%M %e") as sdate 
FROM Calendar C 
  LEFT JOIN ORDERS O ON C.date=O.date
WHERE O.date <= NOW() AND O.date >= NOW() - INTERVAL 1 MONTH 
GROUP BY DAY(date) 
ORDER BY date ASC;