Jun Yang
Bishop-MacDermott Family Professor
Chair, Department of Computer Science
Duke University
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I wrote RA, a simple, portable relational algebra interpreter that works on top of (many) SQL-based relational database systems. It's perfect for learning relational algebra. I've used it in teaching my courses, and a variant of it has been used by Prof. Jennifer Widom's popular online database course at Stanford.

Last updated Fri Mar 12 17:00:15 EST 2021