Q&A for experienced flyers, pilots, and builders of drones and model aircraft
SELECT PostHistoryTypes.Id, MIN(PostHistoryTypes.Name) AS Name, COUNT(CASE WHEN SUBSTRING(Text, 1, 2) = '{"' THEN 1 END) AS JsonCount, COUNT(*) AS AllCount FROM PostHistory, PostHistoryTypes WHERE PostHistory.Id % 100 = 0 AND PostHistory.PostHistoryTypeId = PostHistoryTypes.Id GROUP BY PostHistoryTypes.Id ORDER BY Id