'Insertion anomaly' presentation slideshows

Schema Refinement and Normal Forms

Schema Refinement and Normal Forms. Review: Database Design. Requirements Analysis user needs; what must database do? Conceptual Design high level description (often done w/ER model) Logical Design translate ER into DBMS data model Schema Refinement consistency, normalization

1.78k views • 134 slides

Functional Dependencies And Normalization

Functional Dependencies And Normalization. R&G Chapter 19. Review: Database Design. Requirements Analysis user needs; what must database do? Conceptual Design high level descr (often done w/ER model) Logical Design translate ER into DBMS data model Schema Refinement

532 views • 43 slides

Schema Refinement and Normal Forms

Schema Refinement and Normal Forms. Chapter 19. Instructor: Mirsad Hadzikadic. The Evils of Redundancy. Redundancy is at the root of several problems associated with relational schemas: redundant storage, insert/delete/update anomalies

504 views • 42 slides

Design Theory for Relational Databases

583 views • 42 slides

Normal Forms

Normal Forms. First Normal Form: all table cells must contain atomic values no sets, arrays, lists, or other collection types no structured objects all relational databases satisfy first normal form by definition

578 views • 40 slides

Chapter 4: Logical Database Design and the Relational Model ( Part II )

Modern Database Management 11 th Edition Jeffrey A. Hoffer, V. Ramesh, Heikki Topi. Chapter 4: Logical Database Design and the Relational Model ( Part II ). Objectives. Define terms List five properties of relations State two properties of candidate keys

580 views • 35 slides

Schema Refinement and Normal Forms

818 views • 32 slides

Data Normalization

Chapter 7 Logical Database Design Relational Systems (Normalization) . Data Normalization. Primarily a tool to validate and improve a logical design so that it satisfies certain constraints that avoid unnecessary duplication of data

680 views • 16 slides

ICS 321 Spring 2011 Normal Forms 1

ICS 321 Spring 2011 Normal Forms 1. Asst. Prof. Lipyeow Lim Information & Computer Science Department University of Hawaii at Manoa. The Problem with Redundancy. Hourly_Emps. Suppose hourly wages are determined by rating Redundant storage : (8,10) stored multiple times

206 views • 9 slides

ICS 321 Fall 2009 Schema Refinement & Normal Forms

ICS 321 Fall 2009 Schema Refinement & Normal Forms. Asst. Prof. Lipyeow Lim Information & Computer Science Department University of Hawaii at Manoa. The Problem with Redundancy. Hourly_Emps. Suppose hourly wages are determined by rating ( this is an eg of functional dependency )

122 views • 2 slides