Generic dependencies and database design
نویسندگان
چکیده
منابع مشابه
Logical Database Design with Inclusion Dependencies
Contrary to popular belief, relation schemes in good classical normal forms are not necessarily devoid of redundancies. This arises from the fact that classical data dependencies are oblivious to important constraints which may exist between sets of attributes occuring in different relation schemes. In this paper, we study how inclusion dependencies (INDs) can be used to model these constraints...
متن کاملDatabase Dependencies
DEFINITION For a relational database to be valid, it is not sufficient that the various tables of which it is composed conform to the database schema. In addition, the instance must also conform to the intended meaning of the database. [15] While many aspects of this intended meaning are inherently informal, it will in general induce certain formalizable relationships between the data in the da...
متن کاملAutomated Database Schema Design Using Mined Data Dependencies
Data dependencies are used in database schema design to enforce the correctness of a database as well as to reduce redundant data. These dependencies are usually determined from the semantics of the attributes and are then enforced upon the relations. This paper describes a bottom-up procedure for discovering multivalued dependencies (MVDs) in observed data without knowing a priori the relation...
متن کاملDatabase sampling with functional dependencies
During the development of information systems there is a need to prototype the database which the applications will use when in operation. A prototype database can be built by sampling data from an existing database. Including relevant semantic information when extracting a sample from a database is considered invaluable to support the development of data-intensive applications. Functional depe...
متن کاملGeneric Multimedia Database Architecture
Multimedia, as it stands now is perhaps the most diverse and rich culture around the globe. One of the major needs of Multimedia is to have a single system that enables people to efficiently search through their multimedia catalogues. Many Domain Specific Systems and architectures have been proposed but up till now no generic and complete architecture is proposed. In this paper, we have suggest...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Computers & Mathematics with Applications
سال: 2001
ISSN: 0898-1221
DOI: 10.1016/s0898-1221(00)00272-8