'Relational algebra query' presentation slideshows

Logic as a Query Language: from Frege to XML

532 views • 31 slides

The Relational Model

The Relational Model. By Elena Ciriani CS157A February 19, 2004 Professor Lee. INTRODUCTION. The relational model is the most used data model for commercial data-processing because it is simple to use and to maintain.

2.09k views • 24 slides

Deductive Databases

Deductive Databases . Chapter 25. Motivation. SQL-92 cannot express some queries: Are we running low on any parts needed to build a ZX600 sports car? What is the total component and assembly cost to build a ZX600 at today's part prices?

260 views • 24 slides

CS405G: Introduction to Database Systems

CS405G: Introduction to Database Systems. Final Review. Database Design. E-R model. E-R model Entities Attributes Relationships. Database Design. 8/21/2014. 8/21/2014. 5. 5. From E-R Diagram to Relations. Relations Schemas Converting E-R diagram to relations Keys Super keys

321 views • 23 slides

The Relational Language

The Relational Language. Todd S. Bacastow January 2004. Relational Query Languages. Query languages Allow manipulation and retrieval of data from a database. Query Languages QLs not intended to be used for complex calculations. QLs support easy, efficient access to large data sets.

419 views • 13 slides