'Handling weak entity sets' presentation slideshows

Database Systems The Relational Data Model

Database Systems The Relational Data Model. assoc. prof., dr. Vladimir Dimitrov e-mail: cht@fmi.uni-sofia.bg web: is.fmi.uni-sofia.bg. Basics of the Relational Model Attributes Schemas Tuples Domains Equivalent Representations of a Relation Relation Instances

1.43k views • 125 slides

Translating ER into Relational (cont.) Schema Design & Refinement

Translating ER into Relational (cont.) Schema Design & Refinement. Lecture #6. Administrative Stuff. Oracle account Password. Special cases: 1) many one relations 2) weak entity sets 3) isa cases. Combining Two Relations . price. name. category. Start Year. name. makes. Company.

857 views • 73 slides

Midterm Review I

Midterm Review I. Database Studies. Design of databases. What kinds of information go into the database? How is the information structured? How do data items connect? Database programming. How does one express queries on the database?

325 views • 32 slides

Lecture 08: E/R Diagrams and Functional Dependencies

Lecture 08: E/R Diagrams and Functional Dependencies. Modeling Subclasses. The world is inherently hierarchical. Some entities are special cases of others We need a notion of subclass. This is supported naturally in object-oriented formalisms. Products. Software products.

428 views • 31 slides

Lecture 08: E/R Diagrams and Functional Dependencies

Lecture 08: E/R Diagrams and Functional Dependencies. Modeling Subclasses. The world is inherently hierarchical. Some entities are special cases of others We need a notion of subclass. This is supported naturally in object-oriented formalisms. Products. Software products.

395 views • 31 slides

Lecture 9: E/R Diagrams and Functional Dependencies

432 views • 31 slides

Lecture 9: E/R Diagrams and Functional Dependencies

447 views • 31 slides

E/R Diagrams and Functional Dependencies

E/R Diagrams and Functional Dependencies. Modeling Subclasses. The world is inherently hierarchical. Some entities are special cases of others We need a notion of subclass. This is supported naturally in object-oriented formalisms. Products. Software products. Educational products.

329 views • 30 slides

Announcement

Announcement. Recitation time Before midterm: 6-7pm, by Earl Wagner After midterm: 5-6pm, by Yi Qiao Newsgroup safe to subscribe Will not cause you to added to the CS mailing list Send all course related questions there for timely response (unless privacy needed). The Relational Data Model.

301 views • 24 slides

Database Management Systems Chapter 3 The Relational Data Model (I)

Database Management Systems Chapter 3 The Relational Data Model (I). Instructor: Li Ma Department of Computer Science Texas Southern University, Houston. September, 2006. The Relational Data Model. Tables Schemas Conversion from E/R to Relations. Attributes (column headers). Tuples

404 views • 22 slides

The Relational Data Model

304 views • 17 slides

The Relational Data Model

239 views • 16 slides

Department of Computer and Information Science, School of Science, IUPUI

Department of Computer and Information Science, School of Science, IUPUI. Data Modeling Translating E-R Diagrams to Relations. Dale Roberts, Lecturer Computer Science, IUPUI E-mail: droberts@cs.iupui.edu. From E-R Diagrams to Relations. Entity set -> relation. Attributes -> attributes.

257 views • 12 slides