Add another query to the MP Activity Report queries

count by map and era

utils/mp-server/query-scripts/17-maps-and-eras-by-game-count.sql

@@ -0,0 +1,14 @@
+select c1.ID as MAP, c2.ID as ERA, count(*) as COUNT
+from wesnothd_game_info game, wesnothd_game_content_info c1, wesnothd_game_content_info c2
+where YEAR(game.START_TIME) = YEAR(CURRENT_DATE - INTERVAL 1 MONTH)
+  and MONTH(game.START_TIME) = MONTH(CURRENT_DATE - INTERVAL 1 MONTH)
+  and game.END_TIME is not NULL
+  and TIMESTAMPDIFF(MINUTE, game.START_TIME, game.END_TIME) > 5
+  and game.INSTANCE_UUID = c1.INSTANCE_UUID
+  and game.GAME_ID = c1.GAME_ID
+  and c1.TYPE = 'scenario'
+  and game.INSTANCE_UUID = c2.INSTANCE_UUID
+  and game.GAME_ID = c2.GAME_ID
+  and c2.TYPE = 'era'
+group by c1.ID, c2.ID
+order by count(*) desc