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A candidate key, or simply a key, ... Keys: An overview of the different types of keys in the RDBMS (Relational Database Management System). ...
In relational database management systems, a unique key is a candidate key. All the candidate keys of a relation can uniquely identify the records of the relation, but only one of them is used as the primary key of the relation. The remaining candidate keys are called unique keys because they can uniquely identify a record in a relation.
Usually one candidate key is chosen to be called the primary key and used in preference over the other candidate keys, which are then called alternate keys. A candidate key is a unique identifier enforcing that no tuple will be duplicated; this would make the relation into something else, namely a bag, by violating the basic definition of a set ...
A database management system used to maintain relational databases is a relational database management system ... If the tuple contains a candidate or primary key ...
A database management system (DBMS) is a computer program (or more typically, ... Candidate key; CAP theorem; Cdb (software) Column (database) Commit (data management)
To conform to 2NF and remove duplicates, every non-candidate-key attribute must depend on the whole candidate key, not just part of it. To normalize this table, make {Title} a (simple) candidate key (the primary key) so that every non-candidate-key attribute depends on the whole candidate key, and remove Price into a separate table so that its ...
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