Video: Dab tsi yog aggregation nyob rau hauv cov ntaub ntawv warehouse?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov ntaub ntawv sib sau yog txheej txheem qhov twg cov ntaub ntawv tau sau thiab nthuav tawm hauv cov ntawv sau ua ke rau kev txheeb xyuas kev txheeb xyuas thiab ua kom tiav cov hom phiaj kev lag luam. Cov ntaub ntawv sib sau yog qhov tseem ceeb rau cov ntaub ntawv warehouse raws li nws pab txiav txim siab raws li qhov loj ntawm cov nqaij nyoos cov ntaub ntawv.
Ntxiv rau qhov no, cov ntaub ntawv sib sau txhais li cas?
Cov ntaub ntawv aggregation yog tej txheej txheem uas cov ntaub ntawv yog sau thiab nthuav tawm nyob rau hauv ib daim ntawv qhia, rau lub hom phiaj xws li kev txheeb cais. Ib qho kev sib sau lub hom phiaj yog kom tau txais cov ntaub ntawv ntau ntxiv txog cov pab pawg raws li qhov txawv txav xws li hnub nyoog, kev ua haujlwm, lossis cov nyiaj tau los.
Ib sab saum toj no, uas yog ib qho piv txwv ntawm cov ntaub ntawv sau ua ke? Cov ntaub ntawv sib sau yog li lub npe hais tias, cov ntaub ntawv tsuas muaj nyob rau hauv tag nrho daim ntawv. Hom piv txwv yog: Cov kev tawm mus rau txhua lub canton hauv tsoomfwv kev xaiv tsa: suav ( sib sau ua ke los ntawm ib tus neeg pov npav) piv rau tag nrho cov pej xeem muaj cai pov npav.
Tsis tas li ntawd, koj txhais li cas los ntawm kev sib sau?
Ib kev sib sau yog kev sib sau, lossis kev sib sau ua ke. Koj daim npav ntaus pob baseball tuaj yeem sawv cev rau kev sib sau ntawm ntau ntau hom ntawv sib txawv. Kev sib sau ua ke los ntawm Latin ad, lub ntsiab lus mus, thiab gregare, lub ntsiab lus pab tsiaj. Yog li ntawd, lo lus yog thawj zaug siv los lus txhais tau tias mus pab tsiaj los yog pab yaj.
Dab tsi yog aggregated thiab disaggregated cov ntaub ntawv?
Aggregated vs. Disaggregated cov ntaub ntawv . Rau aggregate cov ntaub ntawv yog sau thiab sau cov ntaub ntawv ; rau disaggregate cov ntaub ntawv yog kom tawg aggregated cov ntaub ntawv mus rau hauv cov khoom seem los yog me me units ntawm cov ntaub ntawv.
Pom zoo:
Dab tsi yog lub hom phiaj ntawm delimiters nyob rau hauv cov ntawv sau npe ob hom ntawv cov ntaub ntawv delimiters?
Cov ntaub ntawv delimited yog cov ntawv nyeem siv los khaws cov ntaub ntawv, uas txhua kab sawv cev rau ib phau ntawv, tuam txhab, lossis lwm yam, thiab txhua kab muaj cov teb sib cais los ntawm tus lej
Dab tsi yog lub hnub qub schema nyob rau hauv cov ntaub ntawv warehouse?
Nyob rau hauv cov ntaub ntawv warehousing thiab lag luam txawj ntse (BI), lub hnub qub schema yog ib tug yooj yim daim ntawv ntawm ib tug dimensional qauv, nyob rau hauv uas cov ntaub ntawv yog teem rau qhov tseeb thiab qhov ntev. Qhov tseeb yog ib qho xwm txheej uas suav los yog ntsuas, xws li kev muag lossis kev nkag. Cov lus tseeb kuj muaj ib lossis ntau qhov ntsuas
Yuav ua li cas rau txim nyob rau hauv Is Nrias teb rau nyiag computer cov ntaub ntawv cov cuab tam los yog tej software qhov chaw code los ntawm ib tug neeg lub koom haum los yog los ntawm lwm yam txhais tau tias?
Kev piav qhia: Kev rau txim hauv Is Nrias teb rau kev nyiag cov ntaub ntawv hauv computer, cov khoom muaj nqis lossis ib qho software cov cai los ntawm ib lub koom haum, ib tus neeg, lossis los ntawm lwm txoj kev yog raug kaw 3 xyoo thiab raug nplua ntawm Rs. 500,000
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