instruction: How many questions included [tag] that was later removed?.
response: SELECT DATE(PH.CreationDate), Posts.Tags, Posts.Id AS "post_link" FROM Posts INNER JOIN PostHistory AS PH ON PH.PostId = Posts.Id WHERE Posts.PostTypeId = @question AND PH.PostHistoryTypeId = @retag AND (STR_POSITION(PH.Text, '<' + @tagToSearch + '>') > 0 AND STR_POSITION(Posts.Tags, '<' + @tagToSearch + '>') = 0 AND STR_POSITION(Posts.Tags, '<' + @tagToSearch2 + '>') > 0) GROUP BY Posts.Tags, Posts.Id, DATE(PH.CreationDate) ORDER BY DATE(PH.CreationDate) DESC