Q&A for gardeners and landscapers
select t1.month, perlposts, juliaPosts from ( Select month(Posts.CreationDate) month, Count(*) As perlPosts From Posts Where PostTypeId = 1 And (Tags Like '%<perl>%' Or Tags like '%<perl>%>' )And Posts.CreationDate >= '2021-01-01' Group By month(Posts.CreationDate) ) t1 inner join ( Select month(Posts.CreationDate) as month, Count(*) As juliaPosts From Posts Where PostTypeId = 1 And (Tags Like '%<julia>%' or Tags like '%<julialang>%' Or Tags like '%<julia>%') And Posts.CreationDate >= '2021-01-01' Group By month(Posts.CreationDate) ) t2 on t1.month=t2.month order by t1.month