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Introduction to Databases

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Resumo de Recurso

Introduction to Databases
  1. Data
    1. raw info
      1. used in application systems
        1. online purchases
          1. elearning
            1. social media
        2. File system
          1. each program
            1. manages own data
            2. limitations
              1. fixed query
                1. separates data
                  1. duplicates data
                    1. data dependance
                      1. incompatible formats
                    2. DBMS
                      1. database system
                        1. create
                          1. organize
                            1. manages
                            2. Advantage
                              1. Data consistency
                                1. Concurrency
                                  1. Backup
                                    1. Flexibiity
                                      1. Redunduncy control
                                      2. Disadvantage
                                        1. complexity
                                          1. size
                                            1. cost
                                              1. performance
                                            2. DB: structured collection of related info organized for multiple usage
                                              1. components
                                                1. people
                                                  1. hardware
                                                    1. software
                                                      1. procedure
                                                        1. data

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