Video: Dab tsi yog aggregation hauv cov ntaub ntawv science?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov ntaub ntawv sib sau yog ib qho txheej txheem uas cov ntaub ntawv tau sau thiab nthuav tawm hauv daim ntawv qhia, rau lub hom phiaj xws li kev txheeb xyuas 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.
Ntawm no, 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.
Kuj Paub, vim li cas kev sib sau cov ntaub ntawv tseem ceeb? Txawm li cas los xij, rho tawm muaj txiaj ntsig cov ntaub ntawv tseem yog ib qho teeb meem, uas ua rau cov ntaub ntawv aggregation tseem ceeb . Ib txheej txheem uas cov ntaub ntawv yog tshawb nrhiav, sib sau ua ke, thiab nthuav tawm hauv daim ntawv sau qhia, kev sib sau cov ntaub ntawv pab cov koom haum kom ua tiav cov hom phiaj kev lag luam tshwj xeeb lossis ua cov txheej txheem / kev tshuaj xyuas tib neeg.
Tom qab ntawd, ib tug kuj yuav nug, dab tsi yog piv txwv ntawm cov ntaub ntawv sau?
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.
Dab tsi yog aggregation nyob rau hauv cov ntaub ntawv warehousing?
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.
Pom zoo:
Dab tsi yog cov ntaub ntawv hloov pauv hauv cov ntaub ntawv khaws cia?
Cov ntaub ntawv hloov pauv yog cov ntaub ntawv uas tau tsim nyob rau hauv daim ntawv thov kev sib ntsib, uas tsis tau khaws cia hauv cov ntaub ntawv tom qab daim ntawv thov raug txiav
Dab tsi yog kev noj cov ntaub ntawv hauv cov ntaub ntawv loj?
Cov ntaub ntawv ingestion yog tus txheej txheem ntawm tau txais thiab import cov ntaub ntawv rau tam sim ntawd siv los yog cia nyob rau hauv ib tug database. Txhawm rau noj ib yam dab tsi yog 'coj ib yam dab tsi los yog nqus ib yam dab tsi.' Cov ntaub ntawv tuaj yeem xa tawm hauv lub sijhawm tiag tiag lossis noj hauv cov khoom siv
Vim li cas kem taw qhia cov ntaub ntawv khaws cia ua cov ntaub ntawv nkag ntawm disks sai dua li kab qhia cov ntaub ntawv khaws cia?
Kem oriented databases (aka columnar databases) yog qhov tsim nyog rau kev ntsuas kev ua haujlwm ntau dua vim tias cov ntaub ntawv hom ntawv (kem hom) qiv nws tus kheej kom nrawm dua cov lus nug ua - scans, aggregation thiab lwm yam. Ntawm qhov tod tes, kab oriented databases khaws ib kab (thiab tag nrho nws. kab) contiguously
Dab tsi yog aggregation nyob rau hauv cov ntaub ntawv warehouse?
Cov ntaub ntawv sib sau ua ke yog cov txheej txheem uas cov ntaub ntawv raug sau thiab nthuav tawm hauv cov ntawv sau ua ke rau kev txheeb xyuas txheeb cais thiab kom ua tiav cov hom phiaj ua lag luam. Cov ntaub ntawv sib sau ua ke yog qhov tseem ceeb rau kev khaws cov ntaub ntawv vim nws pab txiav txim siab raws li cov ntaub ntawv nyoos ntau heev
Dab tsi yog cov teeb meem ntawm kev tswj cov ntaub ntawv hauv cov ntaub ntawv ib txwm muaj?
Nyob rau tib lub sijhawm, qhov kev tswj hwm cov ntaub ntawv ib puag ncig tsim teeb meem xws li cov ntaub ntawv rov ua dua thiab tsis sib xws, cov kev pab cuam-cov ntaub ntawv dependence, inflexibility, tsis muaj kev ruaj ntseg, thiab tsis muaj cov ntaub ntawv sib qhia thiab muaj