diff --git a/README.md b/README.md
index e7ad470..54ce573 100644
--- a/README.md
+++ b/README.md
@@ -97,3 +97,9 @@ INSERT INTO `radiate_type` (`id`,`name`, `create_by`,`create_time` ) VALUES ('3'
 INSERT INTO `radiate_type` (`id`,`name`, `create_by`,`create_time` ) VALUES ('4',  '电子加速器','admin','2025-07-07 00:00:00');
 INSERT INTO `radiate_type` (`id`,`name`, `create_by`,`create_time` ) VALUES ('5',  '质子加速器','admin','2025-07-07 00:00:00');
 ```
+# 20250730
+```sql
+UPDATE experiment_radiation_process
+SET radiation_standard = SUBSTRING_INDEX(radiation_standard, ',', -1)
+WHERE radiation_standard LIKE '%,%';
+```
\ No newline at end of file