MySQL populate empty date values - date

Question

I am running some query's against our incident logging database for our individual customers. What I want to return is all the month names from 2012 and a count of how many open incidents there have been. This works fine for a customer who has been with us for over 12 months but not for a customer who has been with us for a shorter period of time.
The query I have is this:
SELECT DATE_FORMAT(FROM_UNIXTIME(createdtime/1000), '%Y') as 'Year',
DATE_FORMAT(FROM_UNIXTIME(createdtime/1000), '%M') as 'Month',
count(wo.workorderid) as 'Total Logged'
FROM workorder_threaded wot
inner join workorder wo
on wo.workorderid = wot.workorderid
and wo.siteid = 4806
and DATE_FORMAT(FROM_UNIXTIME(createdtime/1000), '%Y') <> '2011'
where wot.workorderid = wot.thd_woid
GROUP BY DATE_FORMAT(FROM_UNIXTIME(createdtime/1000), '%Y%m')
The output I get is this:
Year Month Total Logged
2012 August 3
2012 September 356
2012 October 212
2012 November 120
I need however the following:
Year Month Total Logged
2012 January 0
2012 February 0
2012 March 0
2012 April 0
2012 May 0
2012 June 0
2012 July 0
2012 August 3
2012 September 356
2012 October 212
2012 November 120
2012 December 0
It doesn't have to be limited by year i.e. the call logging DB has data in this from 2011 so the query can be modified to filter the year range.
I know that this is not populating because the data does not exist and I have seen ways of creating a numbers \ date table and referencing this to populate the date but am struggling to do this. I have also changed around joins and where conditions to no avail.
Thanks in advance.

Answer 1

You need to use LEFT JOIN here