Multivalued dependency

In database theory, a multivalued dependency is a full constraint between two sets of attributes in a relation.

In contrast to the functional dependency, the multivalued dependency requires that certain tuples be present in a relation. Therefore, a multivalued dependency is a special case of tuple-generating dependency. The multivalued dependency plays a role in the 4NF database normalization.

单词	Multivalued dependency
释义	Multivalued dependency 英语百科 Multivalued dependency In database theory, a multivalued dependency is a full constraint between two sets of attributes in a relation. In contrast to the functional dependency, the multivalued dependency requires that certain tuples be present in a relation. Therefore, a multivalued dependency is a special case of tuple-generating dependency. The multivalued dependency plays a role in the 4NF database normalization.
随便看	penetrating ulcer of anastomotic stoma penetrating ulcer of stomach penetrating varnish penetrating vibrator penetrating wave penetrating wound penetrating wound of cheek Penetrating wound of eyeball penetrating wound of lung Penetrating wound of orbit with foreign body Penetrating wound of orbit without foreign body Penetrating Wounds penetration penetration advance penetration aids penetration altitude penetration and fracture test penetration area penetration asphalt penetration ballistics penetration bead penetration bomb penetration bombs penetration breccia penetration by water