Video: Vim li cas cov ntaub ntawv marts yuav tsum tau?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Data marts pab kom cov neeg siv khaws cov ntaub ntawv rau ib lub tuam tsev lossis cov ncauj lus, txhim kho cov neeg siv lub sijhawm teb. Vim cov ntaub ntawv marts catalog tshwj xeeb cov ntaub ntawv , lawv feem ntau xav tau qhov chaw tsawg dua kev lag luam cov ntaub ntawv warehouses, ua rau lawv yooj yim mus nrhiav thiab pheej yig dua khiav.
Ua li no, vim li cas peb thiaj xav tau cov ntaub ntawv mart?
Nws muab kev nkag tau yooj yim rau kev thov nquag cov ntaub ntawv . Data mart yooj yim dua los siv thaum piv rau cov tuam txhab Datawarehouse. Tib lub sijhawm, tus nqi ntawm kev siv Data Mart yog qhov tsawg dua piv nrog kev siv tag nrho cov ntaub ntawv lub tsev khaws khoom.
Ib yam li ntawd, data mart nrog piv txwv yog dab tsi? A data mart yog ib feem yooj yim ntawm cov cov ntaub ntawv warehouse uas xa ib qho kev ua haujlwm cov ntaub ntawv teeb. Data marts tej zaum yuav muaj nyob rau cov kab loj ntawm kev lag luam, tab sis lwm yam marts tuaj yeem tsim rau cov khoom tshwj xeeb. Piv txwv suav nrog cov khoom raws caij nyoog, nyom thiab vaj, lossis cov khoom ua si.
Raws li txoj cai, data mart yog dab tsi thiab nws qhov zoo?
Qhov zoo ntawm kev siv cov ntaub ntawv mart: Txhim kho lub sijhawm kawg ntawm cov neeg siv los ntawm kev tso cai rau cov neeg siv nkag mus rau cov ntaub ntawv tshwj xeeb uas lawv xav tau. Ib tug condensed thiab ntau tsom xam version ntawm ib cov ntaub ntawv warehouse. Txhua tus muaj nplooj siab rau ib chav tsev tshwj xeeb lossis ua haujlwm. qis nqi dua li siv lub tsev khaws ntaub ntawv tag nrho.
Dab tsi yog qhov txawv ntawm lub tsev khaws ntaub ntawv thiab cov ntaub ntawv mart?
Ob leeg Data Warehouse thiab Data Mart yog siv los khaws cia cov ntaub ntawv . Lub ntsiab qhov sib txawv ntawm cov ntaub ntawv warehouse thiab Data mart yog tias, Data Warehouse yog hom database uas yog cov ntaub ntawv - taw qhia hauv xwm. thaum, Data Mart yog hom database uas yog qhov project-oriented hauv xwm. Cov ntaub ntawv warehouse yog top-down model.
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