diff --git a/SQL-for-analyzing-Synapse-PostgreSQL-database-stats.md b/SQL-for-analyzing-Synapse-PostgreSQL-database-stats.md
index b700904..5c1da74 100644
--- a/SQL-for-analyzing-Synapse-PostgreSQL-database-stats.md
+++ b/SQL-for-analyzing-Synapse-PostgreSQL-database-stats.md
@@ -141,3 +141,12 @@ public.state_group_edges - 122 MB
   43601  !iNmaIQExDMeqdITdHH:matrix.org              | Riot
   43601  !iNmaIQExDMeqdITdHH:matrix.org              | Riot Web/Desktop
 ```
+
+## Lookup room state info by list of room_id
+```sql
+SELECT * FROM room_stats_state
+WHERE room_id IN (
+ '!OGEhHVWSdvArJzumhm:matrix.org',
+ '!YTvKGNlinIzlkMTVRl:matrix.org'
+)
+```
\ No newline at end of file