Cov txheej txheem:
- Kuv puas yuav tsum hloov kho cov txheeb cais tom qab tsim qhov ntsuas?
- Puas rov tshem tawm qhov ntsuas qhov sib cais lossis hloov kho cov txheeb cais thiab lwm yam?
- Yuav ua li cas hloov cov ntaub ntawv txheeb cais ua li cas?
- Puas indexes hloov tshiab?
Video: Puas hloov cov txheeb cais rov tsim cov indexes?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
Yog tias ib tug neeg nug koj cov lus nug "Puas rov tsim kho cov ntaub ntawv hloov tshiab tshiab?", tej zaum koj yuav hais tias "tau kawg". Tej zaum koj yuav xav tsis thoob thaum paub tias index rebuild tsis hloov tag nrho cov txheeb caisNco ntsoov tias tsis yog qhov ntsuas ntsuas txhais tau tias cov txheeb cais cuam tshuam nrog kab / kab uas tau tsim los yog tsim manually.
Kuv puas yuav tsum hloov kho cov txheeb cais tom qab tsim qhov ntsuas?
Koj yuav tsum tsis txhob hloov kho cov txheeb cais tom qab koj rov tsim qhov Performance index raws li kev tsim kho nws muab cov ntaub ntawv tshiab rau koj.
Puas rov tshem tawm qhov ntsuas qhov sib cais lossis hloov kho cov txheeb cais thiab lwm yam?
Index fragmentation yuav tsis raug cuam tshuam nyob rau hauv txhua txoj kev, cov txheej txheem rov qab kho cov nplooj ntawv cov ntaub ntawv raws nraim 1: 1 raws li ua ntej; tab sis cov ntaub ntawv fragmentation ua los ntawm cov ntaub ntawv loj hlob yuav raug txo, vim hais tias lub restore tsim cov ntaub ntawv nyob rau hauv ib daim.
Yuav ua li cas hloov cov ntaub ntawv txheeb cais ua li cas?
Hloov kho cov txheeb cais kom ntseeg tau tias cov lus nug suav nrog cov txheeb cais tshiab Txawm li cas los xij, kev hloov kho cov txheeb cais ua rau cov lus nug rov ua dua. Peb pom zoo kom tsis txhob hloov kho cov txheeb cais ntau zaus vim tias muaj kev sib pauv ua haujlwm ntawm kev txhim kho cov lus nug thiab lub sijhawm nws yuav siv los ua cov lus nug.
Puas indexes hloov tshiab?
Indexes yog hloov kho tsis siv neeg txog yam uas tau khaws cia rau hauv lawv (cov nqi ntawm cov kab uas tau ntsuas). Txawm li cas los xij qee qhov DBMS xav tau kev saib xyuas tsis tu ncua (aka "rov tsim") ntawm lawv txhawm rau txhawm rau txhim kho qhov khaws cia ntawm qhov ntsuas qhov tseem ceeb.
Pom zoo:
Puas cais cov kab sib cais ua mob ntau dua li cov hlua khi?
Puas spacers raug mob ntau dua li braces? Thaum cov spacers raug tso thawj zaug, koj yuav ntsib kev tsis xis nyob thiab mob me ntsis, tab sis lawv tsis mob ntau dua li cov braces Qhov no yog vim tsuas yog lub siab me ntsis thiab ntawm ob peb cov hniav.
Puas indexes tsim los ntawm views?
Indexes tsuas yog tsim los ntawm cov kev xav uas muaj tib tus tswv raws li cov lus hais los yog cov roojQhov no tseem hu ua tus tswv tsis raug cai-chain ntawm qhov pom thiab lub rooj.). Feem ntau, thaum lub rooj thiab saib nyob hauv tib lub tswv yim, tib lub tswv yim-tus tswv siv rau txhua yam khoom hauv schema .
Puas yog bayesian cov txheeb cais muaj txiaj ntsig rau kev kawm tshuab?
Nws yog dav siv hauv kev kawm tshuab Bayesian qauv nruab nrab yog ib qho kev saib xyuas kev kawm algorithm. Naïve Bayes classifiers muaj nyob rau hauv kev faib cov dej num. Bayesian tau siv rau hauv kev kawm tob niaj hnub no, uas tso cai rau kev kawm tob algorithms los kawm los ntawm cov ntaub ntawv me me .
Yuav rov tsim dua lossis rov tsim dua?
As verbs qhov txawv ntawm rebuild thiab rebuilt yog rebuilt yog tsim dua thaum rebuilt yog (rebuild) . Yuav siv li cas rov tsim dua hauv kab lus? Rebuild kab lus piv txwv Tau lub sij hawm poob rov qab los tsim dua tshiab. … Tom qab nws cov kauj ruam kev puas tsuaj tau ua ib zaug los txhim kho lub tsev teev ntuj.
Puas yog cov neeg txheeb cais xav tau ntau?
Txoj Haujlwm Outlook Tag Nrho Kev Ua Haujlwm ntawm lej thiab tus lej suav tau kwv yees kom nce 33 feem pua ntawm 2020 txog 2030, nrawm dua qhov nruab nrab rau txhua txoj haujlwm . Lub teb chaws twg muaj kev xav tau ntau rau cov neeg txheeb cais?
