Some Facts about Databases

Key Words Data Types Coding

Key Words• Field a single piece of information

eg Gender, Surname

• Record the collection of fields stored about one person or thing

• Primary Key the field that uniquely identifies a record

eg Student Number

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a) Field b) Record c) Primary key

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Data Types

• Each field stores data of a particular Data Type eg Number, Text, Date, Currency

• Some Key Facts:– Text Data Type can store Letters and

Numbers = Alphanumeric– Alphabetic means letters only. Access

does not have an alphabetic data type.

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Data Types used in Access

• Text Letters and Numbers (Alphanumeric)

• Number Numbers

• Currency Numbers with 2 decimal places

(for money)

• Date/Time For dates - prevents silly dates eg 63 August

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Which word best describes this data?

a) Alphabetic b) Alphanumeric c) Numeric

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Which word best describes this data?

a) Alphabetic b) Alphanumeric c) Numeric

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Data Types Next Question

Which word best describes this data?

a) Alphabetic b) Alphanumeric c) Numeric

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Data Types Coding

All about Coding

• Coding means using a shortened form when entering data

• eg L = Large M = Medium S = Small

• Coding means you don’t have to type in so much data

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