Degree (of a relation)

A form of cryptographic transposition based on arranging plain text in a form that generates columns; then the columns are extracted as the cipher text.
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A subset of attributes, columns, or fields that can be used to uniquely identify any record in a table.
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An operation that takes two relations as operand and produces a new relation by concealing the tuples and matching the corresponding columns when a stated condition holds between the two.
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A collection of information arranged in columns and rows in which each column displays one particular type of information.
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A characteristic defined for a class. Attributes are used to maintain the state of the object of a class. Values can be connected to objects via the attributes of the class. Typically, the connected value is determined by an operation with a single parameter identifying the object. Attributes implement the properties of a type. A column within a table of a relational database.
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