'Enrolled table holds information' diaporamas de présentation

Database Management Systems Chapter 3

Database Management Systems Chapter 3. The Relational Model. Why Study the Relational Model?. Most widely used model. Vendors: IBM, Informix, Microsoft, Oracle, Sybase, etc. Simple data representation and it can express complex queries. Recent competitor: object-oriented model

547 views • 54 slides

The Relational Model Chapter 3

The Relational Model Chapter 3. How is data represented in the relational model? What integrity constraints can be expressed? How can be data created and modified? How can data be manipulated and queried? How can we create, modify and query tables using SQL?

554 views • 49 slides

The Relational Model

514 views • 41 slides

COP5725: Principles of Database Management Systems Fall 2011 Relational Model

COP5725: Principles of Database Management Systems Fall 2011 Relational Model. Why Study the Relational Model?. Most widely used model. Vendors: IBM, Informix, Microsoft, Oracle, Sybase, etc. Very simple model Often matches how we think about data

416 views • 41 slides

The Relational Model

The Relational Model. Relational Model Concepts. The relational data model is based on the concept of a relation. The strength of the relational approach to data management comes from the formal foundation provided by the theory of relations.

193 views • 19 slides