Video: Lub rooj twg muaj cov ntaub ntawv ntau yam hauv cov ntaub ntawv warehouse?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
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 .)
Pom zoo:
Tus qauv twg yog siv los hloov cov ntaub ntawv kho mob thiab kev tswj hwm ntawm ntau lub tsev kho mob cov ntaub ntawv xov xwm HIS)?
Kev Noj Qab Haus Huv Qib Xya lossis HL7 yog hais txog cov txheej txheem thoob ntiaj teb rau kev hloov pauv cov ntaub ntawv kho mob thiab kev tswj hwm ntawm cov ntawv thov software siv los ntawm ntau tus kws kho mob. Cov qauv no tsom rau cov txheej txheem thov, uas yog 'txheej 7' hauv OSI qauv
Puas yog lub rooj virtual uas muab lub qhov rais los ntawm qhov twg ib tus tuaj yeem pom cov ntaub ntawv?
Zoo li kev sib koom ua haujlwm, qhov kev pom yog ib qho piv txwv ntawm cov qauv kev sib raug zoo. Ib qho kev pom tsim ib lub rooj virtual los ntawm SELECT nqe lus thiab qhib lub ntiaj teb ntawm kev yooj yim rau kev txheeb xyuas cov ntaub ntawv thiab kev tswj xyuas. Koj tuaj yeem xav txog qhov pom raws li lub thav duab txav tau los yog qhov rais uas koj tuaj yeem pom cov ntaub ntawv
Ntev npaum li cas cov ntaub ntawv tuaj yeem khaws cia hauv cov ntaub ntawv warehouse?
10 xyoo Yog li ntawd, cov ntaub ntawv khaws cia hauv lub tsev khaws ntaub ntawv li cas? Cov ntaub ntawv yog feem ntau khaws cia rau hauv ib lub tsev khaws ntaub ntawv los ntawm cov txheej txheem rho tawm, hloov pauv thiab thauj khoom (ETL), qhov twg cov ntaub ntawv tau muab rho tawm los ntawm qhov chaw, hloov mus rau qhov zoo cov ntaub ntawv thiab ces loaded rau hauv ib lub tsev khaws khoom .
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 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