updated readme

README.md

@@ -152,6 +152,17 @@ Geni defaults to always run in transactions but if you want to prevent usage of
 Then Geni won't use transactions for the specific migration.
 This works for both up and down
 
+Example:
+
+```sql
+-- transaction:no
+CREATE TABLE table_2 (
+  id INT PRIMARY KEY,
+  name VARCHAR(255) NOT NULL,
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+```
+
 ### Running migration
 
 Running migration can be done using