Video: Dab tsi yog muab faib hauv cov ntsiab lus rau databases?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Kev faib tawm yog cov database txheej txheem uas cov ntxhuav loj heev muab faib ua ntau qhov me me. Los ntawm kev faib lub rooj loj rau hauv cov rooj me me, cov lus nug uas nkag tau tsuas yog ib feem ntawm cov ntaub ntawv tuaj yeem khiav nrawm dua vim tias muaj cov ntaub ntawv tsawg dua los luam theej duab.
Hauv qhov no, dab tsi yog qhov sib txawv ntawm kev faib cov txheej txheem hauv database?
Siv cov txheej txheem faib cov ntaub ntawv no, database rooj yog muab faib nyob rau hauv ob txoj kev: ib theem muab faib thiab composite muab faib.
Cov txheej txheem yog:
- Hash Partitioning.
- Range Partitioning.
- List Partitioning.
Qhov thib ob, sharding thiab partitioning hauv database yog dab tsi? Sharding yog ib txoj kev ntawm kev faib thiab khaws cia ib lub logical dataset nyob rau hauv ntau yam databases . Los ntawm kev faib cov ntaub ntawv ntawm ntau lub tshuab, ib pawg ntawm database systems tuaj yeem khaws cov ntaub ntawv loj dua thiab ua raws li kev thov ntxiv. Sharding kuj hu ua kab rov tav muab faib.
Tsis tas li ntawd, qhov kev faib tawm hauv SQL yog dab tsi?
Rooj muab faib yog ib txoj hauv kev los faib ib lub rooj loj rau hauv me me, tswj tau ntau yam tsis tas yuav tsim cov rooj sib cais rau txhua ntu. Cov ntaub ntawv hauv a muab faib lub rooj yog lub cev khaws cia rau hauv pawg ntawm kab hu ua muab faib thiab ib leeg muab faib tuaj yeem nkag tau thiab khaws cia nyias.
Vertical partitioning hauv database yog dab tsi?
Vertical partitioning suav nrog kev tsim cov rooj nrog tsawg kab thiab siv cov ntxhuav ntxiv los khaws cov kab seem. Normalization kuj tseem cuam tshuam qhov kev faib ntawm txhua kab hla cov rooj, tab sis ntsug partitioning mus dhau qhov ntawd thiab muab faib kab txawm thaum twb normalized.
Pom zoo:
Kuv yuav tshuaj xyuas kuv cov ntsiab lus muab faib li cas?
Partitioning a line segment, AB, into a ratio a/b involving the line segment into a + b equal parts and find a point that is a sib npaug qhov chaw ntawm A thiab b qhov sib npaug ntawm B. Thaum nrhiav ib qho point, P, mus rau muab faib ib kab ntu, AB, rau hauv qhov ratio a/b, peb xub pom ib tug ratio c = a / (a + b)
Dab tsi yog lub ntsiab lus ntawm cov lus tsis hais lus?
Tsis hais lus. Cov ntaub ntawv xav tau sib txuas lus hauv kev sib pauv kev sib raug zoo los ntawm cov cim qhia nrog cov lus siv hauv kev hais lus. Xws li cues muaj xws li lub cev lus, lub suab, inflexion, thiab lwm yam ntawm lub suab, hnav ris tsho, thiab lwm yam. Saib kuj tsis hais lus
Lub ntsiab lus ntawm lo lus statistical inference yog dab tsi hom inferences peb yuav ua rau cov pej xeem tsis?
Peb yuav ua dab tsi ntawm kev xam pom txog cov pej xeem tsis muaj? Statistical inference yog hais txog cov lus xaus hais txog cov pejxeem. parameters raws li cov ntaub ntawv los ntawm cov qauv statistic(s). Kev kwv yees thiab kev sim yuav raug them
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
Lub sij hawm nyob rau hauv ontology yog dab tsi yog hais txog cov lus piav qhia hierarchical thiab cov lus hais txog ib qho tshwj xeeb?
Lub schema yog ib lo lus ontology uas hais txog cov lus piav qhia hierarchical thiab cov lus hais txog ib lub npe. Ib lub npe sawv cev rau tag nrho lub tuam txhab lossis kev faib hauv ib lub tuam txhab. Ib tug cwj pwm yog ib tug yam ntxwv tshwj xeeb hais txog ib chav kawm, uas yog ib hom khoom