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Keywords:
Superkey,
Attributes,
Super,
Unique,
Minimal
a minimal set of attributes that uniquely identifies an object or link
a combination of attributes that can be uniquely used
a means of providing an additional unique key into a table
a minimal superkey -- a superkey with no redundant attributes
a minimal superkey, that is, a key is a superkey such that no subset of the key is also a superkey
a minimal superkey, that is, a superkey from which no attributes may be removed without making it no longer a superkey
an attribute (or minimum set of two or more attributes) whose value functionally determines each of the other columns in a relation
an attribute (or minimum set of two or more attributes) whose value uniquely and unambiguously identifies each tuple in a relation
an attribute (or set of attributes) that uniquely identifies a row
an attribute or set of attributes that uniquely identifies individual occurrences or an entity type
an attribute or set of attributes that uniquely identify an instance of an entity, e
a set of columns that could be chosen to be the entity's unique identifier
a subset of at least one superkey
a unique key which is in addition to the primary key
A key that uniqueley identifies rows in a table.
An attribute or set of attributes that can be used to uniquely identify instances of the entity. One of these candidate keys is chosen as the key of the entity. If no appropriate candidate exists, a system-assigned incremented number is used.
(RM) A minimal super key, candidate to become primary key. keys.php
a potential primary key or a super key without redundancies but that is not selected to be the PK.
A Candidate Key is any Attribute or group of Attributes which uniquely identify each instance of an Entity and which is a possible choice for the Primary Key.
A combination of attributes that can be used to uniquely identify a database record without any extraneous data.
A key that uniquely identifies rows in a table. Any of the identified candidate keys can be used as the table primary key. Any of the candidate keys that is not part of the primary key is called an alternate key. One can describe a Candidate Key as a Super Key that contains only the minimum number of columns necessary to determine uniqueness.
In the relational model, a candidate key of a relvar is a set of attributes of that relvar such that
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