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Master's Dissertation
DOI
https://doi.org/10.11606/D.45.1993.tde-20210728-235248
Document
Author
Full name
Maristella Ribas Biazzi
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 1993
Supervisor
Title in Portuguese
Valores vazios e incerteza no modelo de dados relacional
Keywords in Portuguese
Ciência Da Computação
Abstract in Portuguese
Este texto constitui, basicamente, uma resenha sobre o tratamento de valores vazios e informacoes incompletas no modelo de dados relacional. Apresentamos tambem uma proposta de implementacao de um sistema gerenciador de bancos de dados que permite um tratamento correto de valores vazios. A resenha abrange diversos aspectos do uso de valores vazios no modelo relacional, tais como formas de representacao, consultas e atualizacoes, e interpretacao de fatos negativos. Apresentamos tambem um historico das pesquisas na area, que sao relativamente recentes
Title in English
not available
Abstract in English
not available
 
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Publishing Date
2021-07-28
 
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