Show last 100 messages from needed user

SQL-for-analyzing-Synapse-PostgreSQL-database-stats.md

@@ -81,6 +81,17 @@ SELECT user_id, SUM(total_events)
    LIMIT 20;
 ```
 
+## Show last 100 messages from needed user, with room names:
+```
+SELECT e.room_id, r.name, e.event_id, e.type, e.content, j.json FROM events e
+  LEFT JOIN event_json j USING (room_id)
+  LEFT JOIN room_stats_state r USING (room_id)
+  WHERE sender = '@LOGIN:example.com'
+  AND e.type = 'm.room.message'
+  ORDER BY stream_ordering DESC
+  LIMIT 100;
+```
+
 ## Show top 20 larger tables by storage size
 ```
 SELECT nspname || '.' || relname AS "relation",