👉 In mathematics, an exact relation is a type of relation that has one unique element for each attribute. In other words, it is a relation where every row in the table contains exactly one row with that attribute value. A specific example of an exact relation might be a person who owns a house and their address. If we have two rows in our table (house number and address) where both values are unique to each individual, then there's only one unique entry for each pair of attributes. Thus
