diff --git a/PostgreSQL/prism/prism.sql b/PostgreSQL/prism/prism.sql
index cfe328a..4e29d66 100644
--- a/PostgreSQL/prism/prism.sql
+++ b/PostgreSQL/prism/prism.sql
@@ -165,10 +165,10 @@ where action_id = (select action_id from actions where action = 'block-break')
   and timestamp > EXTRACT(EPOCH FROM current_timestamp(0))::bigint - 86400 * 1
 limit 100;
 
--- 1天内，发射器的数据，按发射的物品分组统计
+-- 1天内，item-dispense行为，按发射的物品分组统计
 select descriptor, count(*)
 from activities
-where action_id = 2
+where action_id = (select action_id from actions where action = 'item-dispense')
   and timestamp > EXTRACT(EPOCH FROM current_timestamp(0))::bigint - 86400 * 1
 group by descriptor
 order by count(descriptor) desc;