Q&A for teachers and students of the Esperanto language
select DATEADD(DAY, DATEDIFF(DAY, 0, creationdate), 0) date , 'Perl' programming_language , count(*) question_count from posts where posttypeid = 1 and creationdate < '2019-02-01' and creationdate >= '2019-01-01' and tags like '%<perl%' group by DATEADD(DAY, DATEDIFF(DAY, 0, creationdate), 0) order by 1 desc