added join so room names show up instead of IDs to the biggest rooms on server sql

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@@ -105,6 +105,13 @@ The log format can vary slightly depending on your log configuration, but here i
 What are the biggest rooms on my server?
 ---
 
-```
-select room_id, count(*) as num_rows from state_groups_state group by room_id order by num_rows desc limit 10;
+```sql
+SELECT s.canonical_alias, g.room_id, count(*) AS num_rows 
+FROM 
+  state_groups_state AS g, 
+  room_stats_state AS s 
+WHERE g.room_id = s.room_id 
+GROUP BY s.canonical_alias, g.room_id
+ORDER BY num_rows desc 
+LIMIT 10;
 ```