Summary
Keywords
Full Transcript
In this lecture of the databases course we consider an optimized translations of ER models into relational models (database schemas/tables). In particular, we will learn how to eliminate tables of certain relationship sets. The identifying relationship sets of weak entity sets can always be eliminated. This elimination of tables will later play an important role for enforcing cardinality limits by the design of the database schema. 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.
