Fjerde normalform (Norwegian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Fjerde normalform" in Norwegian language version.

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acm.org (Global: 1,185^th place; Norwegian: 1,389^th place)

Fagin, Ronald (1. september 1977). «Multivalued dependencies and a new normal form for relational databases». ACM Transactions on Database Systems. 3. 2: 262–278. ISSN 0362-5915. doi:10.1145/320557.320571. Besøkt 26. mars 2024.

Fagin, Ronald (1. september 1977). «Multivalued dependencies and a new normal form for relational databases». ACM Transactions on Database Systems. 3. 2: 262–278. ISSN 0362-5915. doi:10.1145/320557.320571. Besøkt 26. mars 2024.
"A relation schema R* is in fourth normal form (4NF) if, whenever a nontrivial multivalued dependency X $\twoheadrightarrow$ Y holds for R*, then so does the functional dependency X → A for every column name A of R*. Intuitively all dependencies are the result of keys." Fagin, Ronald (September 1977). «Multivalued Dependencies and a New Normal Form for Relational Databases» (PDF). ACM Transactions on Database Systems. 2 (1): 262–278. doi:10.1145/320557.320571. Arkivert fra originalen (PDF) 29. november 2007. Besøkt 26. mars 2024.
Wu, Margaret S. (mars 1992). «The Practical Need for Fourth Normal Form». ACM SIGCSE Bulletin. 24 (1): 19–23. doi:10.1145/135250.134515.

"A relation schema R* is in fourth normal form (4NF) if, whenever a nontrivial multivalued dependency X $\twoheadrightarrow$ Y holds for R*, then so does the functional dependency X → A for every column name A of R*. Intuitively all dependencies are the result of keys." Fagin, Ronald (September 1977). «Multivalued Dependencies and a New Normal Form for Relational Databases» (PDF). ACM Transactions on Database Systems. 2 (1): 262–278. doi:10.1145/320557.320571. Arkivert fra originalen (PDF) 29. november 2007. Besøkt 26. mars 2024.

"A relation schema R* is in fourth normal form (4NF) if, whenever a nontrivial multivalued dependency X $\twoheadrightarrow$ Y holds for R*, then so does the functional dependency X → A for every column name A of R*. Intuitively all dependencies are the result of keys." Fagin, Ronald (September 1977). «Multivalued Dependencies and a New Normal Form for Relational Databases» (PDF). ACM Transactions on Database Systems. 2 (1): 262–278. doi:10.1145/320557.320571. Arkivert fra originalen (PDF) 29. november 2007. Besøkt 26. mars 2024.

Fagin, Ronald (1. september 1977). «Multivalued dependencies and a new normal form for relational databases». ACM Transactions on Database Systems. 3. 2: 262–278. ISSN 0362-5915. doi:10.1145/320557.320571. Besøkt 26. mars 2024.