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Lesson Navigation IconRelationales Datenmodell

Unit Navigation IconKonzepte

Unit Navigation IconAbbildung ER-Schema

LO Navigation IconERM concepts

LO Navigation IconRule 1

LO Navigation IconRule 2

LO Navigation IconRule 3

LO Navigation IconRule 4

LO Navigation IconRule 5

LO Navigation IconRule 6

LO Navigation IconRule 7

LO Navigation IconRule 8

LO Navigation IconAnwendung der Regeln

LO Navigation IconUmwandlungsübung

Unit Navigation IconData integrity

Unit Navigation IconNormalisierung

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Rule 6

In this step all relationships of order n are transformed into the relational database scheme. This happens according to rule 5.

Definition rule 6

For all n-ary relationship types (n>2) use rule 5: Create a new relational scheme R and use the primary keys of all connected relational schemes (S, T, etc.) as foreign keys. Together they form the primary key for this new relational scheme R.

See the example of rule 5.

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