What is a Database?
What is it for?
Objectives – Class Database
• Understand what a database is and what it’s for.
• Think about database design
– Records
– F...
Examples of databases
Examples of databases
Databases 101
• Records: All the pupils in this class
• Fields:
– Surname, Forenames
– House
– Date of birth
– Height, wei...
Databases 101
• Records: All the pupils in this class
• Fields:
– Surname, Forenames
– House
– Date of birth
– Height, wei...
ID field - Key field
• Allows the computer to keep track of which
record is which.
• Must be unique to each record, cannot...
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Databases 101

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Databases 101

  1. 1. What is a Database? What is it for?
  2. 2. Objectives – Class Database • Understand what a database is and what it’s for. • Think about database design – Records – Fields • Field types – Text, number, date, boolean • Data accuracy: – Validation – Verification What’s the difference? Relational vs flat file
  3. 3. Examples of databases
  4. 4. Examples of databases
  5. 5. Databases 101 • Records: All the pupils in this class • Fields: – Surname, Forenames – House – Date of birth – Height, weight – Colour of Hair, Colour of Eyes – Favourite Film – Owns an Apple computer. Text Single Letter Date Number Multi Choice Text Yes/No
  6. 6. Databases 101 • Records: All the pupils in this class • Fields: – Surname, Forenames – House – Date of birth – Height, weight – Colour of Hair, Colour of Eyes – Favourite Film – Owns an Apple computer. Step 1: Create a general form using WORD that will make it easy to fill in the information
  7. 7. ID field - Key field • Allows the computer to keep track of which record is which. • Must be unique to each record, cannot have duplicates • Doesn’t need to be understandable by humans.

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