Add Resources to free-courses-en.md#sql (#5081)

* fix-3892

* Alphabetical order.

free-courses-en.md

@@ -644,6 +644,8 @@
 ### SQL
 
 * [Introduction to Database Queries](https://www.edx.org/course/introduction-to-database-queries) - (edX New York University) - (Aspen Olmsted)
+* [Introduction to Databases and SQL Querying](https://www.udemy.com/course/introduction-to-databases-and-sql-querying/) - Rakesh Gopalakrishnan (Udemy)
+* [SQL Foundations](https://www.udemy.com/course/sql-essentials-for-beginners/) - Sagar Uppuluri (Udemy)
 * [SQL Tutorial](https://www.youtube.com/playlist?list=PL_RGaFnxSHWr_6xTfF2FrIw-NAOo3iWMy)
 * [SQL Tutorial - Full Database Course for Beginners](https://www.youtube.com/watch?v=HXV3zeQKqGY) - (Mike Dane) - (freeCodeCamp)