Fifth normal form
Fifth normal form (5NF), also known as project-join normal form (PJ/NF), is a level of database normalization designed to reduce redundancy in relational databases recording multi-valued facts by isolating semantically related multiple relationships. A table is said to be in the 5NF if and only if every non-trivial join dependency in that table is implied by the candidate keys. A join dependency *{A, B, … Z} on R is implied by the candidate key(s) of R if and only if each of A, B, …, Z is a superkey for R.
Wikipage redirect
primaryTopic
Fifth normal form
Fifth normal form (5NF), also known as project-join normal form (PJ/NF), is a level of database normalization designed to reduce redundancy in relational databases recording multi-valued facts by isolating semantically related multiple relationships. A table is said to be in the 5NF if and only if every non-trivial join dependency in that table is implied by the candidate keys. A join dependency *{A, B, … Z} on R is implied by the candidate key(s) of R if and only if each of A, B, …, Z is a superkey for R.
has abstract
Fifth normal form (5NF), also ...... relational database operators.
@en
La quinta forma normal (5FN), ...... l database operators" de 1979
@es
П'я́та норма́льна фо́рма (5НФ) ...... , B, …, Z є суперключем для R.
@uk
Пятая нормальная форма (5NF) — ...... шения реляционной базы данных.
@ru
关系数据库设计的第五范式 (5NF)，也称投影-连接范式（p ...... ional database operators中首次提出。
@zh
Link from a Wikipage to an external page
Wikipage page ID
Link from a Wikipage to a Wikipage in a different language about the same or a related subject.
page length (characters) of wiki page
Wikipage revision ID
1,012,210,203
Link from a Wikipage to another Wikipage
wikiPageUsesTemplate
subject
hypernym
comment
Fifth normal form (5NF), also ...... , B, …, Z is a superkey for R.
@en
La quinta forma normal (5FN), ...... l database operators" de 1979
@es
П'я́та норма́льна фо́рма (5НФ) ...... , B, …, Z є суперключем для R.
@uk
Пятая нормальная форма (5NF) — ...... шения реляционной базы данных.
@ru
关系数据库设计的第五范式 (5NF)，也称投影-连接范式（p ...... ional database operators中首次提出。
@zh
label
Fifth normal form
@en
Fünfte Normalform
@de
Quinta forma normal
@es
П'ята нормальна форма
@uk
Пятая нормальная форма
@ru
第五范式
@zh