Databases Course - SQL Tutorial - Non-Monotonic Queries | Database Tutorial 5g

In this lecture of the databases course we learn about (non-)monotonic SQL queries. The queries we have seen so far (except outer joins) compute monotonic operations. We will discuss that non-monotonic behavior is indicated by statement like "for all" and "there does not exist". In the subsequent parts of this lecture, we will learn how to write non-monotonic queries using NOT IN and NOT EXISTS. This is the databases online course given at the Vrije Universiteit Amsterdam by Jörg Endrullis. The course objective is to obtain a good understanding of relational database systems from the user perspective. This includes the ability to develop conceptual database models, as well as key concepts and skills in relational database theory and practice. Among others, we treat in this course the following subjects: (a) entity–relationship diagrams for the design of database schemata, (b) the relational database model and integrity constraints, (c) SQL (structured query language) for retrieving information from relational databases, (d) database normalisation and functiona dependencies (reasoning about good database design), (e) transactions and concurrency control. The slides are based on work by Peter Boncz and Torsten Grust.