diff --git a/pages/总复习2023t1.md b/pages/总复习2023t1.md
index d8cec6e..50959c5 100644
--- a/pages/总复习2023t1.md
+++ b/pages/总复习2023t1.md
@@ -1088,7 +1088,7 @@
 						- First Normal Form (1NF): :-> This is the most basic level of
 						  id:: 648974ba-7334-4e73-a0ae-6b8fc6ec99ab
 						  normalization. In 1NF, each table cell should contain _only a single value, and each column should have a unique name_. The first normal form helps to eliminate duplicate data and simplify queries.
-						- Second Normal Form (2NF): :->  2NF eliminates redundant data by requiring that each _non-key attribute_ be dependent on the primary key. This means that _each column should be directly related to the primary key_, and not to other
+						- Second Normal Form (2NF): :->  2NF eliminates redundant data by requiring that each _non-key attribute_ be ==dependent on the primary key==. This means that _each column should be directly related to the primary key_, and not to other
 						  id:: 648974ba-cc9e-4cdf-a312-3af1bcab23f2
 						  columns.
 						- Third Normal Form (3NF): :->  3NF builds on 2NF by requiring
@@ -1099,7 +1099,7 @@
 						- Fourth Normal Form (4NF): 4NF is a further refinement of BCNF that ensures that _a table does not contain any multi-valued dependencies._
 						- Fifth Normal Form (5NF): 5NF is the highest level of normalization and involves decomposing a table into smaller tables to _remove data redundancy and improve data integrity._
 					- Anomaly
-						- Update Anomalies
+						- Update Anomalies #flashcard
 							- 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 
@@ -1107,7 +1107,20 @@
 								  it is not allocated to any department then we cannot insert it in the 
 								  table so, it will create an insertion anomaly.
 							- Deletion anomalies
+								- If we delete some rows from the table and if any other information or 
+								  data which is required is also deleted from the database, this is called
+								   the deletion anomaly in the database. For example, in the above table, 
+								  if we want to delete the department number ECT669 then the details of 
+								  Rajesh will also be deleted since Rajesh's details are dependent on the 
+								  row of ECT669. So, there will be deletion anomalies in the table.
 							- Modification anomalies
+								- When we update some rows in the table, and if it leads to the 
+								  inconsistency of the table then this anomaly occurs. This type of 
+								  anomaly is known as an updation anomaly. In the above table, if we want 
+								  to update the address of Ramesh then we will have to update all the rows
+								   where Ramesh is present. If during the update we miss any single row, 
+								  then there will be two addresses of Ramesh, which will lead to 
+								  inconsistent and wrong databases.
 			- LATER Block 4
 				- DONE Distributed DBMS
 					- DONE client server arch #flashcard