'Weak entities' presentation slideshows

Carnegie Mellon Univ. Dept. of Computer Science 15-415/615 - DB Applications

Carnegie Mellon Univ. Dept. of Computer Science 15-415/615 - DB Applications. C. Faloutsos - A. Pavlo Lecture#2: E-R diagrams. Problem. Develop an application for U.G. admin: Student info Who-takes-what class Class rosters Transcripts How do you proceed? (Which role(s) are you playing?).

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Lecture 14: Database Design

Prof. Ray Larson & Prof. Marc Davis UC Berkeley SIMS Tuesday and Thursday 10:30 am - 12:00 pm Fall 2002 http://www.sims.berkeley.edu/academics/courses/is202/f02/. Lecture 14: Database Design. SIMS 202: Information Organization and Retrieval. Lecture Overview. Review

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MIS 385/MBA 664 Systems Implementation with DBMS/ Database Management

MIS 385/MBA 664 Systems Implementation with DBMS/ Database Management. Dave Salisbury salisbury@udayton.edu (email) http://www.davesalisbury.com/ (web site). Modeling reality. A database must mirror the real world if it is to answer questions about the real world

492 views • 46 slides

IT420: Database Management and Organization

IT420: Database Management and Organization. Introduction to ER Model Adina Cr ? iniceanu www.cs.usna.edu/~adina. Lab. Lab 1 due next Tuesday (January 17) before class You do not have to enforce the rule Landing > Takeoff Send created database to adina@usna.edu. Last Time.

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MIS710 Module 1a Data and Process Modeling

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The Entity-Relationship Model

The Entity-Relationship Model. Chapter 2. Database Design Process. Requirement collection and analysis DB requirements and functional requirements Conceptual DB design using a high-level model Easier to understand and communicate with others Logical DB design (data model mapping)

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COMP231 Tutorial 1

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The Entity-Relationship Model

The Entity-Relationship Model. Chapter 2. Steps of Database Design. Requirements analysis Conceptual design: our focus for chapter 2 Logical database design: covered in chapter 3 Then: Refine schema, consider physical representation, consider security issues.

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The Entity-Relationship Model

The Entity-Relationship Model. Chapter 2. Overview of Database Design. Conceptual design : ( ER Model is used at this stage.) What are the entities and relationships in the enterprise? What information about these entities and relationships should we store in the database?

544 views • 18 slides

ER to Relational Mapping

ER to Relational Mapping. name. ssn. lot. Employees. Logical DB Design: ER to Relational. Entity sets to tables. CREATE TABLE Employees (ssn CHAR (11), name CHAR (20), lot INTEGER , PRIMARY KEY (ssn) ).

276 views • 18 slides

DATABASE DESIGN

DATABASE DESIGN. DATABASE DESIGN AS A MODELING PROCESS Models as vehicles for understanding reality DATABASE DESIGN AS AN INTUITIVE PROCESS Satisficing vs. Rationality DATABASE DESIGN AS AN ITERATIVE PROCESS Prototyping. THREE SCHEMA DATA MODEL. Data Model

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Mapping E/R Diagrams to Relational Database Schemas

Mapping E/R Diagrams to Relational Database Schemas. Second Half of Chapter 3. E/R ? Relation Model (Example). since. since. name. name. dname. dname. ssn. did. did. budget. budget. lot. (0,*). (1,1). Departments. Employees. Manages. (0,*). hours_worked. (0,*). Works_In. ?.

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Translating E/R Diagrams into Relational Schemas

225 views • 11 slides