This video was recorded at Scala Days Berlin 2016 Follow us on Twitter @ScalaDays or visit our website for more information http://scaladays.org Anstract: Quill (http://getquill.io/) is a compile-time language integrated query library with a powerful query compilation mechanism based on the paper "A Practical Theory of Language-Integrated Query" (http://homepages.inf.ed.ac.uk/slindley/papers/practical-theory-of-linq.pdf). This talk will give an overview of the "Scylla and Charybdis" theorem that supports the query compilation, present the Quoted Domain Specific Language (QDSL) (http://homepages.inf.ed.ac.uk/wadler/papers/qdsl/qdsl.pdf) approach used by the API, and give a quick view of Quill's functionality.