Video: Dab tsi yog cov ntaub ntawv hauv database?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov ntaub ntawv , nyob rau hauv cov ntsiab lus ntawm databases , yog hais txog tag nrho cov khoom ib leeg uas khaws cia rau hauv a database , tus kheej los yog raws li kev teeb tsa. Cov ntaub ntawv hauv a database feem ntau yog khaws cia rau hauv database tables, uas yog teem rau hauv kab uas dictate lub cov ntaub ntawv hom khaws cia rau hauv.
Kuj nug, cov ntaub ntawv txhais li cas hauv database?
A cov ntaub ntawv txhais lus (DDL) yog ib hom lus siv computer siv los tsim thiab hloov cov qauv ntawm database cov khoom hauv a database . Cov no database cov khoom muaj xws li views, schemas, ntxhuav, indexes, thiab lwm yam.
Dab tsi yog qhov txawv ntawm cov ntaub ntawv thiab database? Lub ntsiab qhov sib txawv ntawm database thiab cov ntaub ntawv qauv yog tias database yog ib phau ntawm cov ntaub ntawv uas yog khaws cia thiab tswj nyob rau hauv lub cim xeeb mus tas li thaum cov ntaub ntawv qauv yog ib txoj hauv kev khaws cia thiab npaj cov ntaub ntawv zoo nyob rau hauv ib ntus nco. Peb tuaj yeem ua tau cov ntaub ntawv tsim kom muaj cov ntaub ntawv muaj txiaj ntsig.
Ib yam li ntawd, tib neeg nug, koj txhais li cas los ntawm cov ntaub ntawv?
Cov ntaub ntawv yog cov ntaub ntawv sib txawv, feem ntau formatted hauv ib txoj kev tshwj xeeb. Txij li thaum nruab nrab-1900s, tib neeg tau siv lo lus cov ntaub ntawv rau txhais tau tias cov ntaub ntawv hauv computer uas kis tau lossis khaws cia. Hais lus nruj, cov ntaub ntawv yog lub plural ntawm datum, ib daim ntaub ntawv.
Cov ntaub ntawv thiab piv txwv ntawm cov ntaub ntawv yog dab tsi?
Cov ntaub ntawv txhais tau tias yog qhov tseeb lossis cov duab, lossis cov ntaub ntawv uas khaws cia hauv lossis siv los ntawm lub computer. Ib piv txwv ntawm cov ntaub ntawv yog cov ntaub ntawv sau rau ib daim ntawv tshawb fawb. Ib piv txwv ntawm cov ntaub ntawv yog email.
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
Dab tsi yog cov ntaub ntawv thev naus laus zis hauv kev tswj cov ntaub ntawv xov xwm?
Kev tswj cov ntaub ntawv xov xwm (MIS) yog hais txog cov txheej txheem loj siv los ntawm kev lag luam lossis kev lag luam, thaum cov ntaub ntawv thev naus laus zis (IT) yog ib feem ntawm cov txheej txheem uas siv los sau thiab xa cov ntaub ntawv. Cov Ntaub Ntawv Technology txhawb nqa thiab pab txhawb kev ua haujlwm ntawm qhov system ntawd
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