Databases Course - SQL Tutorial - Inner and OuterJoins: LEFT JOIN, RIGHT JOIN, FULL JOIN | Database Tutorial 5f

In this lecture of the databases course we learn how join tables using inner joins (JOIN) and outer join operations (LEFT JOIN, RIGHT JOIN and FULL JOIN). The outer join operations preserve all rows in the left, right or both table(s), respectively, even if the rows do not have a matching row in the other table (the join condition is never satisfied). We will see various ways to specify the join condition: via USING (set of attributes), via ON (join predicate) or via NATURAL joins (automatically derived). 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.