Logical or Boolean Data stored in Boolean form can only be one of two available values. Think of a light switch – it’s on or off. Examples include: YES TRUE 1 1 FALSE NO 0 0 M M F F

Alphanumeric Alphanumeric data is any combination of letters, numbers and symbols etc.) This data type is also known as a string or text. Examples: £4987 is a lot to pay for a badger I like fish DL61

Alphanumeric Continued… Alphanumeric or text/string is used to hold telephone numbers. In a computer, telephone numbers are stored as text. This is because the telephone number contains a leading zero and spaces.

Real A real number is one which has decimal places. Examples:

Integer Integer numbers are whole numbers, no bits, no decimal places. Examples:

Date Dates can be stored in many different forms. In the UK we write the date in the form DD/MM/YYYY e.g. 31/12/2014. In the US, they use the form MM/DD/YYYY e.g. 12/31/2014. Examples: 15/08/ /11/30 12/31/1999

Other Data Types Currency – Software will automatically add £ or $ to data and include decimal places. E.g. £ Image – Some databases will allow an image to be stored, for example a photo of a criminal and their fingerprints on a crime database.