5. Data Type and Organisation

The syllabus says that you should be able to:

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

Notes covering this section:

• Different Data Types
• Data Organisation
• Types of Database
• Analogue and Digital Data

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