Abstract
While there are several online tools to practice SQL, except for single tool to practice relational algebra, there practically are no system for teaching, tutoring or assessing relational query language assignments for database classes. In this paper, we introduce ReliQ, an online tutoring and assessment system for teaching relational query languages to database students. ReliQ supports a number of features for convenient management of assignments and tests for both practice (in tutoring mode) and authentic assessment (in testing mode). It is capable of grading assignments autonomously and generating useful hints for an effective, enriching and unparalleled eLearning experience.