Created by: paul01234
Number of Blossarys: 51
It is an attribute used to sort and identify data in the database. Types of database keys are primary keys, candidate keys, and foreign keys.
The process of generating a set of relation schemas that allows the storage of information without unnecessary redundancy while still allowing the easy retrieval of information.
A superkey which has a set of attributes whose values ensure the unique identification of the rows in a table. It is the principal means of identifying tuples in a relation. Its value is never, or at ...
The primary means for retrieving information from a database. This consists of questions given to the database in predefined format. A large number of database management systems use the standard ...
A database concept which guarantees that the relationships between the tables in a database remain consistent. This also ensures that a relation for a given set of attributes can also be found in a ...
Comprised of a collection of tables which are individually assigned with a unique name. The relational database is the primary database model currently used for commercial-data processing ...
An association among several entities. The relationship between and among entities may be one to one, one to many, and many to many.