In this course I learned how to use table joins and relational set theory on joining data. I have also learned how to work with more than one table in SQL, use inner joins, outer joins, and cross joins, leverage set theory, including unions, intersect, and except clauses, and create nested queries.

This library implements an efficient join function to join 2 (usually large) incrementally refreshed tables, taking into account the refresh timestamp of each table and the fact that data might arrive late.

In this project, i'll analyze video game critic and user scores, in addition to sales data for the top 400 video games released since 1977. I'll search for a golden age of video games by identifying release years that users and critics liked best, and I'll explore the business side of gaming by looking at game sales data.