Added blog links

Author: Aatmaj-Zephyr

README.md

@@ -14,3 +14,8 @@ DBMS_SQL Notes
 - ![sql-basics-cheat-sheet-a4-page-1](https://user-images.githubusercontent.com/65703138/150641076-dd864e47-41fd-46e5-87a5-6e4c34326c96.png)
 
 - ![sql-basics-cheat-sheet-a4-page-2](https://user-images.githubusercontent.com/65703138/150641077-f19c4ada-751b-4117-ae25-a3c573928c80.png)
+
+- Blogs
+1) [Geeks for geeks](https://www.geeksforgeeks.org/sql-tutorial/)
+2) [w3-schools](https://www.w3schools.com/sql/)
+3) [tutorials Point](https://www.tutorialspoint.com/sql/index.htm)