diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index 900e690..fabd4c2 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -1026,6 +1026,7 @@
 							- Group data using GROUP BY and HAVING.
 							- Join tables together.
 							- Use subqueries.
+						- update database and formulate queries using INSERT, UPDATE, and DELETE.
 			- DONE Block 3
 			  collapsed:: true
 				- DONE DB transaction management