Cov txheej txheem:
Video: 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?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Kem taw qhia databases (aka columnar databases) yog ntau haum rau analytical workloads vim lub cov ntaub ntawv hom ntawv ( kem format) qiv nws tus kheej rau sai dua query processing - scans, aggregation thiab lwm yam. Ntawm qhov tod tes, kab oriented databases cia ib leeg kab (thiab tag nrho nws kab ) sib txuas.
Kuj tseem paub yog, vim li cas kab ntawv taw qhia cov ntaub ntawv nrawm dua?
Ib columnar database yog sai dua thiab muaj txiaj ntsig ntau dua li ib txwm muaj database vim cov ntaub ntawv khaws cia yog los ntawm kab tsis yog los ntawm kab. Kem oriented databases muaj sai dua nug kev ua tau zoo vim cov kem tsim kom cov ntaub ntawv los ze zog ua ke, uas txo cov sij hawm nrhiav.
Ib tug kuj yuav nug, dab tsi yog qhov txawv ntawm ib kab oriented thiab ib kab oriented database? Kab oriented databases yog databases uas npaj cov ntaub ntawv los ntawm cov ntaub ntawv, khaws tag nrho cov ntaub ntawv cuam tshuam nrog a sau tseg ib sab hauv nco. Kem oriented databases yog databases uas npaj cov ntaub ntawv los ntawm teb, khaws tag nrho cov ntaub ntawv cuam tshuam nrog a teb ntawm ib sab hauv nco.
Kuj nug, dab tsi yog qhov txiaj ntsig tseem ceeb ntawm kev khaws cov ntaub ntawv hauv kem taw qhia kev cia?
Ua ntej, cia peb tshawb pom qee qhov txiaj ntsig tseem ceeb rau cov kab ntawv taw qhia kab ke:
- Kev ua tau zoo ntawm cov lus nug sib sau ua ke (xws li COUNT, SUM, AVG, MIN, MAX)
- Cov ntaub ntawv muaj txiaj ntsig zoo compression thiab / lossis muab faib.
- Muaj tseeb scalability thiab ceev cov ntaub ntawv loading rau cov ntaub ntawv loj.
- Siv tau los ntawm ntau yam 3rd party BI analytic tools.
Dab tsi yog columnar databases zoo rau?
Los xaus, columnar databases yog zoo rau : Cov lus nug uas tsuas muaj ob peb kab xwb. Aggregation queries tiv thaiv ntau cov ntaub ntawv. Kem-wise compression.
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
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
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 .
Dab tsi yog cov ntsiab lus ntawm cov kab lus taw qhia?
Hauv kev sau ntawv, kev taw qhia, uas tuaj yeem yog ib lossis ob kab lus, qhia lub ntsiab lus. Muaj peb ntu rau kev taw qhia: cov lus qhib, cov kab lus txhawb nqa, thiab cov ntsiab lus pib
Vim li cas cov txheej txheem khaws cia sai dua?
Koj cov lus hais tias Cov txheej txheem khaws cia sai dua SQL Queries tsuas yog qee qhov tseeb. Yog li yog tias koj hu rau cov txheej txheem khaws cia dua, lub cav SQL thawj zaug tshawb nrhiav los ntawm nws cov npe ntawm cov lus nug cov phiaj xwm thiab yog tias nws pom qhov sib tw, nws siv cov phiaj xwm optimized