MySQL Left Join Subselect

Може да има по-добър начин да направите това и не съм го тествал в MySQL, но следното работи в SQL Server 2005:

Select a.language, b.template, count (c.template) as combo_count
from
(select distinct language from tablename) as a
inner join (select distinct template from tablename) as b on 1 < 2 /* this could be cross join, same thing. */
left outer join tablename c on c.language = a.language and c.template = b.template
group by a.language, b.template
order by 1, 2

Ето резултатите с вашите примерни данни:

au  t1  0
au  t2  1
au  t3  0
en  t1  3
en  t2  0
en  t3  0
ge  t1  0
ge  t2  1
ge  t3  2