Cov txheej txheem:
- Yuav ua li cas koj thiaj li tau txais cov ntaub ntawv thawj zaug thiab zaum kawg uas siv kev sib sau ua ke?
- Puas yog aggregator a transformation?
- Yuav ua li cas sib sau ua ke kev hloov pauv txhim kho kev ua tau zoo?
- Yuav ua li cas kom tau txais cov ntaub ntawv kawg hauv cov ntaub ntawv xov xwm?
Video: Vim li cas kev hloov pauv hloov pauv rov qab kab kawg?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
Thaum siv Aggregator hloov pauv, koj yuav tsum kuaj xyuas pab pawg raws li cov txiaj ntsig rov qab txhua kab los ntawm ua kev sib sau ua ke ib los ntawm ib qho thiab hla mus rau cov kav dej. Yog tias tsis muaj pawg los ntawm kev txheeb xyuas, kab kawg yuav raug ua tiav thiab nws yuav rov qab tsuas yog ib kab (kab kawg) vim nws tsis muaj lus txib kom sau cov ntaub ntawv.
Yuav ua li cas koj thiaj li tau txais cov ntaub ntawv thawj zaug thiab zaum kawg uas siv kev sib sau ua ke?
Los ntawm kev siv kev hloov pauv hloov pauv, ua ntej thiab zaum kawg kev sib sau
- Jitendra. Teb rau: Aug 23, 2013.
- Koj tuaj yeem tau txais Thawj & kawg Cov Ntaub Ntawv los ntawm Rank T / R bcz hauv Rank T / R nws yuav lim cov lej thiab cov ntaub ntawv.
Puas yog aggregator a transformation?
Aggregator transformation is an active transformation Thiab nws yog siv los ua kev suav ntawm cov ntaub ntawv xws li suav, qhov nruab nrab, suav, thiab lwm yam. kab cov ntaub ntawv nyob rau hauv lub aggregate cache. … Peb tuaj yeem siv cov nqe lus raws cai los lim kab.
Yuav ua li cas sib sau ua ke kev hloov pauv txhim kho kev ua tau zoo?
Siv cov lus qhia hauv qab no txhawm rau txhim kho qhov ua tau zoo ntawm kev hloov pauv Aggregator:
- Pab los ntawm kab lus yooj yim.
- Siv sorted input.
- Siv incremental aggregation.
- Lim cov ntaub ntawv ua ntej koj sau nws.
- txwv kev sib txuas chaw nres nkoj.
Yuav ua li cas kom tau txais cov ntaub ntawv kawg hauv cov ntaub ntawv xov xwm?
Yuav ua li cas kom tau txais thawj zaug thiab zaum kawg cov ntaub ntawv los ntawm lub rooj / cov ntaub ntawv? Kev daws: Kauj Ruam 1: Nag thiab tso cov chaw nres nkoj los ntawm qhov chaw tsim nyog rau ob qib kev hloov pauv. Kauj Ruam 2: Tsim ib lub tshuab hluav taws xob rov siv tau rov qab siv tau pib tus nqi pib 1 thiab txuas tus nqi tom ntej rau ob qho kev hloov pauv qib.
Pom zoo:
Kev hloov pauv feem ntau tsis zoo vim li cas lossis vim li cas ho tsis?
Feem ntau ntawm kev hloov pauv yog nruab nrab ntawm lawv cov teebmeem ntawm cov kab mob uas lawv tshwm sim. Kev hloov pauv tau zoo tuaj yeem ua ntau dua los ntawm kev xaiv ntuj. Kev hloov pauv tsis zoo yuav ua rau muaj kab mob caj ces lossis mob qog noj ntshav .
Puas hloov pauv hloov pauv tuaj yeem hloov kho?
Nyob hauv ntau qhov kev sim, qhov sib txawv ntawm kev ywj pheej yog kev tsim kho uas tsuas yog tuaj yeem tswj tsis ncaj . Puas yog qhov sib txawv nyob ntawm qhov ntsuas lossis tswj tau? Ib qhov sib txawv yog qhov ntsuas lossis manipulated hauv kev sim.
Vim li cas yav tom ntej ntawm kev hloov pauv hloov pauv tsis zoo?
Teb cov lus teb raws li nram no: Kev hloov pauv kev cog qoob loo kuj hu ua slash thiab hlawv ua liaj ua teb. … Yav tom ntej ntawm kev hloov pauv kev cog qoob loo tsis zoo vim qhov no tau ua rau muaj kev cuam tshuam loj loj thiab ua rau cov av ntxiv lawm .
Kev hloov pauv rov qab ua haujlwm li cas?
Cov neeg them se uas pom tias lawv ua yuam kev ntawm lawv cov ntaub ntawv them se tom qab tuaj yeem xa daim ntawv them se rov qab los kho nws. Qhov no suav nrog tej yam xws li hloov cov xwm txheej ua ntaub ntawv thov, thiab kho cov nyiaj tau los, cov qhab nia lossis kev txiav tawm.
Vim li cas qhov kev hloov pauv rov qab tau npaj?
Txoj kev hloov pauv hauv kev ua ntaub ntawv thov, hloov pauv ntawm tus lej ntawm cov neeg thov kev thov, thov tsis raug them se thiab txiav tawm, thiab tshaj tawm cov nyiaj tau los tsis raug yog vim li cas tus neeg them se ua daim ntawv hloov kho .
