Video: Cov ntaub ntawv zoo li cas yog cov ntaub ntawv ua haujlwm?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Lub chaw ua haujlwm database yog qhov chaw rau cov ntaub ntawv khaws cia. Cov ntsiab lus hauv cov ntaub ntawv ua haujlwm tuaj yeem ntxiv thiab tshem tawm ntawm ya. Cov databases no tuaj yeem yog ib qho SQL ntawv los yog NoSQL -based, qhov twg tom kawg yog npaj rau kev ua haujlwm ntawm lub sijhawm.
Tsis tas li lo lus nug yog, dab tsi yog kev ua haujlwm database system?
Kev ua haujlwm database kev tswj hwm tshuab (tseem hu ua OLTP On Line Transaction Processing databases ), yog siv los hloov kho cov ntaub ntawv hauv lub sijhawm tiag tiag. Kev ua haujlwm databases cia koj hloov qhov ntawd cov ntaub ntawv (ntxiv, hloov lossis rho tawm cov ntaub ntawv ), ua nws hauv lub sijhawm tiag tiag.
Ib sab saum toj no, dab tsi yog qhov sib txawv ntawm databases? Raws li kev xav tau ntawm kev siv, muaj cov ntaub ntawv hauv qab no muaj nyob hauv khw:
- Centralized database.
- Distributed database.
- Tus kheej database.
- End-user database.
- Kev lag luam database.
- NoSQL database.
- Kev ua haujlwm database.
- Relational database.
Kuj nug yog, dab tsi yog 3 hom databases?
Ib qho system uas muaj databases npe a database tswj system, los yog DBM. Peb tau tham txog plaub lub ntsiab hom databases : ntawv databases , desktop database programs, kev sib raug zoo database tswj systems (RDMS), thiab NoSQL thiab object-oriented databases.
Lub tsev khaws ntaub ntawv sib txawv li cas los ntawm kev ua haujlwm database?
Kev ua haujlwm cov tshuab yog tsim los txhawb kev ua lag luam loj. Cov ntaub ntawv khaws cia Cov kab ke feem ntau yog tsim los txhawb kev ua haujlwm siab (piv txwv li, OLAP). Kev ua haujlwm systems feem ntau muaj kev txhawj xeeb txog tam sim no cov ntaub ntawv . Cov ntaub ntawv khaws cia systems feem ntau muaj kev txhawj xeeb txog keeb kwm cov ntaub ntawv.
Pom zoo:
Dab tsi yog qhov sib txawv ntawm pab pawg cov ntaub ntawv thiab cov ntaub ntawv tsis yog pawg?
Ob leeg yog cov ntaub ntawv muaj txiaj ntsig ntawm cov ntaub ntawv tab sis qhov sib txawv ntawm lawv yog cov ntaub ntawv tsis muaj ntaub ntawv yog rawdata. Qhov no txhais tau hais tias nws nyuam qhuav tau sau tab sis tsis txheeb rau hauv ib pawg lossis cov chav kawm. Ntawm qhov tod tes, groupeddata yog cov ntaub ntawv uas tau teeb tsa ua pawg los ntawm cov ntaub ntawv nyoos
Vim li cas cov ntaub ntawv tiaj tus tsis zoo dua li cov ntaub ntawv sib raug zoo?
Ib lub rooj ua ntaub ntawv tiaj tus yog qhov tseem ceeb rau kev sau cov ntaub ntawv tsawg. Tab sis cov ntaub ntawv loj loj tuaj yeem ua tsis tau raws li nws siv ntau qhov chaw thiab nco dua li cov ntaub ntawv sib txheeb. Nws kuj yuav tsum tau muab cov ntaub ntawv tshiab ntxiv txhua zaus koj nkag mus rau cov ntaub ntawv tshiab, qhov kev sib raug zoo database tsis
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
Vim li cas cov ntaub ntawv zoo tseem ceeb heev rau kev sau cov ntaub ntawv txheeb cais?
Cov ntaub ntawv muaj txiaj ntsig zoo yuav ua kom muaj txiaj ntsig ntau dua hauv kev tsav lub tuam txhab kev vam meej vim yog kev vam khom ntawm qhov tseeb-raws li kev txiav txim siab, tsis yog kev coj cwj pwm lossis tib neeg kev xav. Ua kom tiav: Xyuas kom tsis muaj qhov khoob ntawm cov ntaub ntawv los ntawm qhov yuav tsum tau sau thiab qhov twg tau sau tiag
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