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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