Indeksai Flashcards

1
Q

Indeksas

A

Paskirtis yra kaip knygos rodykles - kur raktiniai zodziai surusiuoti abeceles tvarka ir nurodomas knygos puslapis

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2
Q

Ka nurodo indeksas

A

adresa

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3
Q

kada naudojami indeksai

A

kai irasus reikia isvesti norima tvarka
Norint susieti irasus tarp lenteliu per bendrus laukus

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4
Q

Ar reikia DB irasus jei naudojami indeksai

A

nereikia

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5
Q

Kas yra pirminis indeksas

A

tai indeksas kai indeksuojamas irasu raktas ty reiksme unikali) be to, irasai fiziskai isdestyti ta pacia tvarka pagal rakta

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6
Q

Klasterinis indeksas

A

kai laukas, pagal kuri sutvarkyti irasai neunikalus

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7
Q

Kiek pirminiu ir klasteriniu indeksu turi kiekviena struktura

A

Viena pirmini arba klasterini indeksa

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8
Q

pagal ka gali buti sukurti antriniai indeksai

A

pagal bet koki nerusiuota lauka

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9
Q

Kokio modelio elementai yra indeksai

A

fizinio

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