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Data Types

Learning Outcomes

At the end of this Unit students will  be able to:

  • identify different data types: logical/Boolean, alphanumeric/text, numeric (real and integer) and date
  • select appropriate data types for a given set of data: logical/Boolean, alphanumeric/text, numeric and date
  • describe what is meant by the terms file, record, field and key field
  • describe different database structures such as flat files and relational tables including the use of relationships, primary keys and foreign keys
  • state the difference between analogue data and digital data
  • explain the need for conversion between analogue and digital data

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