Fourth normal form

Known as: 4NF, 4th normal form

Fourth normal form (4NF) is a normal form used in database normalization. Introduced by Ronald Fagin in 1977, 4NF is the next level of normalization…

Papers overview

Semantic Scholar uses AI to extract papers important to this topic.

2015

Data dependencies are a useful tool to design relational databases. In particular, functional and multivalued dependencies are…

2007

A new, simple and one-step method used for synthesis of new compound tetramethylammonium pentachlorofluororhenate- (V) in very…

2007

A common approach in designing relational databases is to start with a universal relation schema, which is then decomposed into…

2005

Normalization as a way of producing good relational database designs is a well-understood topic. However, the same problem of…

2002

In this paper we present some properties of the nested databases. Also we present some defin itions of the nested normal forms…

1994

1989

ANALYSIS, DESIGN AND IMPLEMENTATION OF A PILOT RELATIONAL DATABASE FOR GROUNDWATER IN THE STATE OF ARKANSAS There are several…

1981

One o f t h e ma in c o n c e r n s o f t h e t h e o r y o f r e l a t i o n a l d a t a b a s e s has been t h e s t u d y o f…

1979

1979

In the relational model, various relationships may exist between the attributes in a relation. The relationships are described by…