Yoon Joon Lee is a professor in the Department of Computer Science at KAIST and a member of the Database Laboratory. He received a PhD from ENSIMAG(École nationale supérieure d'informatique et de mathématiques appliquées de Grenoble) for his work on SQL optimizing query processing. As a graduate student, he helped to implement a relational DBMS, called MICROBE running on super microcomputer. His current interests include stream processing, DBMS with SSD, and analytic query processing.