Normalization

Descrição

Mapa Mental sobre Normalization, criado por yuroshyini1719 em 14-11-2015.
yuroshyini1719
Mapa Mental por yuroshyini1719, atualizado more than 1 year ago
yuroshyini1719
Criado por yuroshyini1719 aproximadamente 10 anos atrás
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Resumo de Recurso

Normalization
  1. Purposes
    1. organizing of attributes and relations
      1. minimizes data redundancies
        1. Issues?
          1. Delete anomilies
            1. Deletng critical info
            2. Update Anomilies
              1. Update data at 1 table only
              2. Insert Anomilies
                1. Error when inserting data
              3. Functional Dependancy
                1. Partial
                  1. attribute that depends on a part of a PK
                    1. occurs when composite PK exists
                    2. Transitive
                      1. a non PK that depends on another non PK
                  2. Process
                    1. UNF - 1NF
                      1. eliminate repeating group
                        1. identify dependancy
                        2. 1NF - 2NF
                          1. remove partial dependancies
                            1. split tables
                            2. 2NF - 3NF
                              1. remove transitive dependancies
                                1. split tables again

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                              Adjectives
                              Dhoha Alsaadi
                              1_Adjectives
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