ISDATut06
Authored by Aaron Kurz
Science, Computers, Business
University
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19 questions
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1.
OPEN ENDED QUESTION
45 sec • Ungraded
Worum handelt es sich bei der relationalen Algebra?
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2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Wodurch werden virtuelle Relationen definiert?
Datenbankschemata
Anfragen
Messwerte
Theoretische Ideen
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Was ist der Unterschied zwischen einer Menge und einer Multimenge?
Maximale Anzahl an Elementen
Datentypen
Reihenfolge
Duplikate
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Was sind die Operanden der relationalen Algebra?
Zahlen
Strings
Relationen
Objekte
5.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Welche binären Basisoperatoren haben wir kennengelernt?
Umbenennung
Vereinigung
Differenz
Kartesisches Produkt
6.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Welche unären Basisoperatoren haben wir kennengelernt?
Projektion
Join
Selektion
Aggregation
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Arbeitet die relationale Algebra mit Mengen oder Multimengen?
Mengen
Multimengen
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