Grundlagen Flashcards

1
Q

Was sind die Operatoren der relationalen Algebra?

A

Projektion π (Pi)
Selektion σ (Sigma)
Umbenennung β (Beta)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Was ist horizontale und was vertikale Speicherung?

A

horizontal: Schlüssel festgelegt
vertikal: Schlüssel frei

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Was sind übliche NoSQL Kategorien?

A

key-value
document
wide column
graph

How well did you know this?
1
Not at all
2
3
4
5
Perfectly