Cov txheej txheem:
- Vim li cas thiaj xav tau lub rooj tseeb?
- Yuav tsum yog dab tsi hauv lub rooj tseeb?
- Puas hnub qub schemas tseem cuam tshuam?
- Puas yog cov lus tseeb tag nrho Denormalized?
Video: Yuav tsum tau hloov cov lus tseeb?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
Yog li ntawd, kev hloov kho cov lus tseeb yog qhov kev daws sai, yooj yim, thiab pom tseeb. Tab sis vim hais tias cov shortcuts no tuaj yeem "ua haujlwm" tsis tau txhais hais tias cov txheej txheem no yog qhov kev coj ua zoo tshaj plaws. Txawm hais tias koj qhov xwm txheej yuav ua rau koj ntseeg tias yuav tsum tau ua kom hloov kho tshiab, tsis txhob hnov qab tias kev hloov kho tshiab yog qhov zoo tshaj plaws.
Vim li cas thiaj xav tau lub rooj tseeb?
Lub Sijhawm Snapshot Fact tables yog siv los soj ntsuam sai thiab tshuaj xyuas qhov kev ua tau zoo ntawm kev ntsuas nyob rau lub sijhawm teem sijhawm (lub limtiam, hli, quarter, xyoo, thiab lwm yam).
Yuav tsum yog dab tsi hauv lub rooj tseeb?
Hauv cov ntaub ntawv khaws cia, lub rooj qhov tseeb muaj qhov ntsuas, ntsuas lossis qhov tseeb ntawm cov txheej txheem lag luamNws nyob ntawm qhov nruab nrab ntawm lub hnub qub schema lossis snowflake schema ncig los ntawm Dimension rooj.… Lub ntsiab tseem ceeb ntawm lub rooj qhov tseeb feem ntau yog ib qho yuam sij sib xyaw uas yog tsim los ntawm tag nrho nws cov yuam sij txawv teb chaws.
Puas hnub qub schemas tseem cuam tshuam?
Lub hnub qub schema tseem cuam tshuam txawm tias koj cov ntaub ntawv loj npaum li cas, txawm tias cov ntaub ntawv me me yog qhov ntau tshaj thaum nws los txog rau lub hnub qub schema qauv. Kev nkag tau yooj yim los nug cov ntaub ntawv rau qhov tseeb thiab qhov ntev yog qhov nkag siab thiab siv sijhawm ntev.
Puas yog cov lus tseeb tag nrho Denormalized?
Fact cov lus tau ua tiav tag nrho kom tau txais cov ntaub ntawv xov xwm hais txog kev hloov pauv (txhua cov ntaub ntawv hauv cov lus tseeb), koj yuav tsum koom nrog lub rooj tseeb nrog lub rooj dimension. Ib txhia hais tias cov lus tseeb nyob rau hauv cov qauv denormalized vim nws yuav muaj cov yuam sij txawv teb chaws.
Pom zoo:
Yuav tsum tau hloov cov hluav taws xob hluav taws xob nrog cov hluav taws xob?
Kuv puas yuav tsum hloov cov hluav taws xob hluav taws xob nrog cov hluav taws xob? Ignition coils thiab spark plugs ua haujlwm zoo ua ke. … Tab sis yog tias koj tsuas yog hloov koj lub qhov hluav taws xob ua ib feem ntawm kev saib xyuas niaj hnub, nws tsis tsim nyog los hloov koj cov hluav taws xob hluav taws xob tib lub sijhawm tshwj tsis yog muaj cov cim qhia tias lawv ua tsis tau Yuav tsum hloov cov hluav taws xob hluav taws xob ntau npaum li cas?
Vim li cas cov ntsiab lus ntawm cov ntawv tseeb yuav tsum tau kawm thiab tshuaj xyuas?
Cov ntsiab lus ntawm cov ntawv tseeb yog qhov tseem ceeb tshaj plaws hauv kev sau zaj dab neeg luv luv. Txhua lub ntsiab lus sawv cev qhov sib txawv piav qhia thiab kev txhais ntawm lub ntsiab lus uas tus sau xav xa tuaj rau tus nyeem . Vim li cas thiaj tseem ceeb kom paub cov ntsiab lus ntawm zaj dab neeg?
Yuav tsum email cov ntsiab lus yuav tsum tau sau npe?
Sau lub ntsiab lus raws li koj xav tau lub npe, pib txhua yam tshwj tsis yog cov lus me nrog cov ntawv loj. Capitalize thawj lo lus ntawm cov ntsiab lus, nrog rau cov npe tsim nyog, tab sis pib lwm lo lus nrog cov ntawv qis . Yuav tsum email cov kab ntawv yuav tsum yog tus lej?
Yuav ua li cas sau cov lus sib cav rau cov lus teb cov lus sau?
Qhia meej meej txog koj qhov kev sib cav. Koj qhov kev sib cav yuav tsum yog qhia meej meej txog txhua yam ntawmlub ncauj lus uas koj tau muab, thiab nws kuj yuav tsum tau ua kom pom tias koj tuaj yeem xav ntawm nws tus kheej (yog tias koj tsom mus rau qib siab), txawm tias nws txawv.
Yuav tsum tau pes tsawg teev cov chickpeas yuav tsum tau tsau?
Slow soaking chickpeas qhuav: Muab lawv tso rau hauv ib lub tais thiab npog nrog dej txias, thiab siv dej kom ntau raws li lawv yuav o thaum lawv tsau. Tawm ib hmos los yog 8-12 teev kom nqus dej thiab o . Kuv puas tuaj yeem tso tau chickpeas rau 5 teev?
