Database Mind Map

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  • Databases
    • Flat-File
      • Adv. All data is held in one place
      • Adv. Easy to set up so no extra knowledge needed
      • Adv. Used for simple data
      • Disadv. Can become messy if too much data is entered
      • Disadv. Data duplication can occur as data has to be changed in multiple places rather than just in one place like a relational database
      • Disadv. Multiple items of data may not be seen on the screen
      • A flat file database is a simple database with only one table
    • Rleational
      • A database linking two or more tavble using relationships
        • Relationships could be 1 to 1, 1 to many or many to many
          • Rleational
            • A database linking two or more tavble using relationships
              • Relationships could be 1 to 1, 1 to many or many to many
              • Disadv. Needs quite a lot of knowledge to set up
              • Disadv. Data stored in a number of places not just one
              • Adv. Data only has to be changed in one place and it will then be changed in all other places at the same time
              • Adv. Alsorts of tables can be linked using relationships meaning all data can be linked
        • Disadv. Needs quite a lot of knowledge to set up
        • Disadv. Data stored in a number of places not just one
        • Adv. Data only has to be changed in one place and it will then be changed in all other places at the same time
        • Adv. Alsorts of tables can be linked using relationships meaning all data can be linked
      • A database is a large collection of organised data presented in a useful format

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