Video: Dab tsi yog cov ntaub ntawv hloov pauv hauv cov ntaub ntawv khaws cia?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov ntaub ntawv tsis tu ncua yog cov ntaub ntawv uas yog tsim nyob rau hauv ib daim ntawv thov kev sib kho, uas tsis tau txais kev cawmdim nyob rau hauv lub database tom qab daim ntawv thov raug txiav.
Ib yam li ntawd, nws yog nug, dab tsi yog data mart hauv cov ntaub ntawv warehouse?
A data mart yog ib tug qauv / kev nkag tau cov qauv tshwj xeeb rau cov ntaub ntawv warehouse ib puag ncig, siv los khaws cov neeg siv khoom cov ntaub ntawv . Cov data mart yog ib tug subset ntawm cov cov ntaub ntawv warehouse thiab feem ntau yog taw qhia rau ib txoj haujlwm tshwj xeeb lossis pab pawg. Cov ntaub ntawv warehouses yog tsim los kom nkag tau rau pawg loj ntawm cov ntaub ntawv ntsig txog.
Qhov thib ob, lub tsev khaws ntaub ntawv sib txawv li cas ntawm cov ntaub ntawv mart? Data Warehouse yog ib tug loj repository ntawm cov ntaub ntawv sau los ntawm txawv qhov chaw nyob qhov twg Data Mart tsuas yog subtype ntawm a cov ntaub ntawv warehouse . Data Warehouse yog tsom rau txhua lub tuam tsev hauv ib lub koom haum whereas Data Mart tsom rau ib pab pawg tshwj xeeb.
Ib yam li ntawd, koj tuaj yeem nug, dab tsi yog cov ntaub ntawv khaws cia nrog piv txwv?
A cov ntaub ntawv warehouse Qhov tseem ceeb muab cov ntaub ntawv los ntawm ntau qhov chaw rau hauv ib qho kev qhia dav dav. Rau piv txwv , hauv ntiaj teb kev lag luam, a cov ntaub ntawv warehouse tej zaum yuav suav nrog cov neeg siv khoom cov ntaub ntawv los ntawm lub tuam txhab cov khoom muag (cov ntawv sau nyiaj ntsuab), nws lub vev xaib, nws cov npe xa ntawv thiab nws cov ntawv teev lus.
Nws txhais li cas rau cov ntaub ntawv theem?
A theem thaj chaw, lossis thaj chaw tsaws, yog thaj chaw cia nruab nrab siv rau cov ntaub ntawv Kev ua haujlwm thaum lub sijhawm rho tawm, hloov pauv thiab thauj khoom (ETL) txheej txheem. Cov data theem cheeb tsam zaum ntawm lub cov ntaub ntawv source(s) thiab cov ntaub ntawv hom phiaj (s), uas feem ntau cov ntaub ntawv warehouses, cov ntaub ntawv marts, los yog lwm yam cov ntaub ntawv chaw khaws cia.
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