Relation Implementation

• \(A_1, A_2, A_3, ... A_n\) are attributes
• \(R\) = (\(A_1, A_2, A_3, ... A_n\)) is a relation schema
• A relation instance over a schema \(R\) is given as \(r(R)\)
• All elements in a relation or an entity are stored as tuples

Ordering

• All tuples in a table are unordered.