diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index e57cab7..d8cec6e 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -1101,6 +1101,11 @@
 					- Anomaly
 						- Update Anomalies
 							- Insertion anomalies
+								- If there is a new row inserted in the table and it creates the 
+								  inconsistency in the table then it is called the insertion anomaly. For 
+								  example, if in the above table, we create a new row of a worker, and if 
+								  it is not allocated to any department then we cannot insert it in the 
+								  table so, it will create an insertion anomaly.
 							- Deletion anomalies
 							- Modification anomalies
 			- LATER Block 4