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@@ -318,7 +318,9 @@ Courses | Duration | Effort | Prerequisites
 
 Courses | Duration | Effort | Prerequisites
 :-- | :--: | :--: | :--:
-[Relational Database Systems](https://www.coursera.org/learn/relational-database)| 6 weeks | 3 hours/week | -
+[Relational Databases and SQL](https://www.edx.org/course/databases-5-sql)| 2 weeks | 10 hours/week | core programming
+[Databases: Modeling and Theory](https://www.edx.org/course/modeling-and-theory)| 2 weeks | 10 hours/week | [Relational Databases and SQL](https://www.edx.org/course/databases-5-sql)
+[Databases: Semistructured Data](https://www.edx.org/course/semistructured-data)| 2 weeks | 10 hours/week | core programming
 [Machine Learning](https://www.coursera.org/learn/machine-learning)| 11 weeks | 4-6 hours/week | linear algebra
 [Computer Graphics](https://www.edx.org/course/computer-graphics-uc-san-diegox-cse167x)| 6 weeks | 12 hours/week | C++ or Java, linear algebra
 [Software Engineering: Introduction](https://www.edx.org/course/software-engineering-introduction-ubcx-softeng1x) | 6 weeks | 8-10 hours/week | Core Programming, and a [sizable project](FAQ.md#why-require-experience-with-a-sizable-project-before-the-Software-Engineering-courses)