How do I include empty rows in a single GROUP BY DAY(date_field) SQL query?

Question

I\'m using MS SQL Server but welcome comparitive solutions from other databases.

This is the basic form of my query. It returns the number of calls per day from the

Answer 1

I would suggest the usage of a date table. With an existing date table in place, you can perform a RIGHT OUTER JOIN to the date table to bring in your missing days.