diff --git a/SQL-for-analyzing-Synapse-PostgreSQL-database-stats.md b/SQL-for-analyzing-Synapse-PostgreSQL-database-stats.md
index 7528a4d..7e48e36 100644
--- a/SQL-for-analyzing-Synapse-PostgreSQL-database-stats.md
+++ b/SQL-for-analyzing-Synapse-PostgreSQL-database-stats.md
@@ -8,15 +8,6 @@ pg_size_pretty
 (1 row)
 ```
 ## Show top 20 larger rooms by state events count
-this is old and not working
-```
-SELECT r.name, s.room_id, s.state_events
-  FROM room_stats s
-  LEFT JOIN room_names r USING (room_id)
-  ORDER BY ts DESC, state_events DESC
-  LIMIT 20;
-```
-maybe, in 2020-4-14 this is:
 ```
 SELECT r.name, s.room_id, s.current_state_events
   FROM room_stats_current s
@@ -25,7 +16,15 @@ SELECT r.name, s.room_id, s.current_state_events
   LIMIT 20;
 ```
 
-and by state_group_events count _(join removed for performance reasons)_:
+and by state_group_events count:
+```
+SELECT 's.room_id', count('s.room_id') cnt, 'rs.name' FROM state_groups_state s
+LEFT JOIN room_stats_current rs USING (room_id)
+GROUP BY s.room_id        
+ORDER BY count(s.room_id) DESC
+LIMIT 20;
+```
+plus same, but with join removed for performance reasons:
 ```
 SELECT s.room_id, count(s.room_id) FROM state_groups_state s
 GROUP BY s.room_id