Understanding the Relational Model
A relation is a mathematical concept that describes how elements of two sets relate to one another. A relational model has some basic characteristics:
Data is stored in tables, and only tables that relate to one another.
Operations on these tables yield only relations.
Everyone accessing the database views information as a table. A relational table consists of
A set of named attributes called columns. These columns represent the attribute of the object being represented.
A set of tuples or rows that describe one particular instance of the object.
The intersection of a row and column is typically referred to as a cell. Columns have domains or data types associated with them that limit the type of information stored ...
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