Relational database design theory is an enormous topic, but you can learn a few principles that can get help you design an efficient travel database for your website. Jot down your database's purpose.

All -- I'm having a devil of a time decoupling my knowledge of programming in loops/iterations and if/then to the set theory of the relational database. I constantly want to iterate over data in ...

The term relational database is almost superfluous these days. After all, every major commercial database product—Oracle, Sybase, DB2—is based on the same underlying relational model. There ...

Specialization: DatabasesInstructor: Di Wu, Assistant ProfessorPrior knowledge needed: Learning OutcomesUnderstand and explain Entities and Relationships.Draw ERD(Entity Relationship ...

Part of the art of relational database design hangs on the judicious use of indexes. If you omit an index for a frequent query, the whole database can slow down under heavy read loads.

Seeking a better model for meeting the industry’s database needs, Edgar F. Codd, an IBM employee, described the theory of relational databases and in June 1970 published the model for data ...

Another problem is that current SQL database systems permit the creation of tables that can contain duplicate rows. The relational model is based on set theory, and a set cannot contain duplicate ...

Database normalization is the cornerstone of database theory. Once a database is normalized, relationships between the data in multiple tables must be established.

Using flat file databases can lead to insertion, deletion and update anomalies. Use of relational databases where primary and foreign keys are used to link tables helps overcome these issues ...