Q&A for community managers, administrators, and moderators
SELECT DATEADD(WEEK, DATEDIFF(WEEK, 0, CreationDate), 0) AS [Week] , COUNT(DISTINCT Posts.Id) AS Count FROM Posts INNER JOIN PostTags ON PostTags.PostId = Posts.Id INNER JOIN Tags ON PostTags.TagId = Tags.Id WHERE Tags.TagName like 'firebase%' AND PostTypeId = 1 AND CreationDate > '2015-01-01' GROUP BY DATEADD(WEEK, DATEDIFF(WEEK, 0, CreationDate), 0) ORDER BY [Week] DESC