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Wirtschaftsinformatik > Entity-relationship Modell (ER-M) > Flashcards

Entity-relationship Modell (ER-M) Flashcards

1
Q

Entitätstyp

A

Tabellen, die Objekte gleichen Typs gespeichert werden.

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2
Q

Attribute

A

Werden darunter Aufgelistet

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3
Q

Primärschlüssel

A

Unterstrichen

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4
Q

darstellung von Relationen in der Martin-Notation

A

Die Relationen werden durch Linien zwischen den Tabellen gekennzeichnet.

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5
Q

Beziehungen sind etweder…

A

Obligatorisch (Muss - Strich) oder optional (Kann - Kreis)

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Wirtschaftsinformatik (11 decks)

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