constraint
in a relational database, a restriction of the domain of an attribute
embedded dependency
certain kind of constraint on a relational database
integrity constraints
data integrity is normally enforced in a database system by a series of integrity constraints or rules
join dependency
database constraint on the set of legal relations over a database scheme; the relationships in the join dependency are independent of each other
multivalued dependency
in database theory, a full constraint between two sets of attributes in a relation; requires that certain tuples be present in a relation, in contrast to functional dependency