Update README.md

Author: essentialprogramming

README.md

@@ -68,3 +68,6 @@ Visit `localhost:8080/apidoc` to see the endpoints.
   - Native Queries
     - Defining and executing native queries : https://thorben-janssen.com/jpa-native-queries/#Createnbspad-hoc_native_queries
     - How to return DTOs from native queries : https://thorben-janssen.com/spring-data-jpa-dto-native-queries/
+    
+  - JOOQ
+    - Window functions : https://blog.jooq.org/probably-the-coolest-sql-feature-window-functions/