'Derived attribute' diaporamas de présentation

Entity-Relationship Model

Entity-Relationship Model. E-R Diagrams Class hierarchies Weak entity sets. Purpose of E/R Model. The E/R model allows us to sketch the design of a database informally. Designs are pictures called entity-relationship diagrams .

979 views • 68 slides

Database Systems

751 views • 58 slides

Chapter 11

784 views • 51 slides

A Fast and Scalable Nearest Neighbor Based Classification

A Fast and Scalable Nearest Neighbor Based Classification. Taufik Abidin and William Perrizo Department of Computer Science North Dakota State University. Outline. Nearest Neighbors Classification Problems

301 views • 30 slides

Chapter 6

Chapter 6. Entity Relationship Model. Basic Elements of E-R Model. Entity Object of the real world that stores data. Eg . Customer, State, Project, Supplier, etc. Attribute A description of an entity. Eg . Worker has name, worker number, department, address, etc. Relationship.

351 views • 23 slides

SA0951a Entity-Relationship Modelling

SA0951a Entity-Relationship Modelling. What is it about?. ER model is used to show the C onceptual schema of an organisation. Independent of specific data model or DBMS The model is later transformed into a Logical model (e.g. relational) on which the physical database is built

219 views • 17 slides

Fast and Scalable Nearest Neighbor Based Classification

Fast and Scalable Nearest Neighbor Based Classification. Taufik Abidin and William Perrizo Department of Computer Science North Dakota State University. Unclassified Object. Search for the k-Nearest Neighbors. Vote the class. Training Set. Classification.

166 views • 16 slides

CS 425 Database Organization ER Diagrams

CS 425 Database Organization ER Diagrams. Manju Muralidharan Priya. Fundamentals. Building Blocks. Advanced concepts. Notations. EXIT. ER Diagrams. An abstract and conceptual representation of data. It is used to design database schema Commonly used during Requirement Analysis phase.

264 views • 12 slides