Characteristics of relations in relational database model?

No Duplicate Tuples - A relation cannot contain two or more tuples which have the same values for all the attributes. i.e., In any relation, every row is unique.

• Tuples are unordered - The order of rows in a relation is immaterial.

• Attributes are unordered - The order of columns in a relation is immaterial.

• Attribute Values are Atomic - Each tuple contains exactly one value for each attribute.

It may be noted that many of the properties of relations follow the fact that the body of a relation is a mathematical set.