Lub rooj twg muaj cov ntaub ntawv ntau yam hauv cov ntaub ntawv warehouse?
Lub rooj twg muaj cov ntaub ntawv ntau yam hauv cov ntaub ntawv warehouse?

Video: Lub rooj twg muaj cov ntaub ntawv ntau yam hauv cov ntaub ntawv warehouse?

Video: Lub rooj twg muaj cov ntaub ntawv ntau yam hauv cov ntaub ntawv warehouse?
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Qhov tseeb lub rooj muaj cov ntaub ntawv multidimensional nyob rau hauv cov ntaub ntawv warehouse . Multidimensional database yog siv los kho qhov "online analytical processing" (OLAP) thiab cov ntaub ntawv warehouse.

Nyob rau hauv txoj kev no, dab tsi yog multidimensional data model nyob rau hauv cov ntaub ntawv warehouse?

Multidimensional cov ntaub ntawv qauv khw cov ntaub ntawv nyob rau hauv daim ntawv ntawm cov ntaub ntawv kub. Feem ntau, cov ntaub ntawv warehouse txhawb nqa ob lossis peb-dimensional cubes. A multidimensional databases pab muab cov ntaub ntawv -Cov lus teb rau cov lus nug nyuaj ua lag luam sai thiab raug.

Ib yam li ntawd, lub rooj multidimensional yog dab tsi? Txhua qhov loj me muaj a rooj ntsig txog nws, hu ua qhov seem rooj , uas piav txog qhov dimension ntxiv. Piv txwv li, qhov loj me rooj rau ib yam khoom yuav muaj tus cwj pwm item_name, hom, thiab hom. A multidimensional cov qauv ntaub ntawv tau teeb tsa nyob ib ncig ntawm lub ntsiab lus tseem ceeb, piv txwv li, kev muag khoom.

Hais txog qhov no, hom database twg yog multidimensional muab txheej rau cov ntxhuav?

A multidimensional database (MDB) yog a hom ntawm database uas yog optimized rau cov ntaub ntawv warehouse thiab online analytical processing (OLAP) daim ntaub ntawv. Multidimensional databases feem ntau tsim siv cov tswv yim los ntawm kev sib raug zoo uas twb muaj lawm database s.

Dab tsi yog qhov dimension hauv cov ntaub ntawv warehousing?

Dimension ( cov ntaub ntawv warehouse ) A qhov ntev yog ib lub qauv uas categorizes qhov tseeb thiab ntsuas nyob rau hauv thiaj li yuav pab kom cov neeg siv teb cov lus nug ntawm kev lag luam. Feem ntau siv qhov ntev yog tib neeg, cov khoom, qhov chaw thiab lub sijhawm. qhov ntev .)

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