Cov txheej txheem:
- Dab tsi yog qhov pom pom thiab yuav siv thaum twg?
- Dab tsi yog qhov txiaj ntsig ntawm kev pom zoo?
- Qhov twg zoo dua los yog pom pom zoo?
- Vim li cas peb siv cov khoom pom hauv cov ntaub ntawv faib tawm?
Video: Qhov twg siv cov khoom pom?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
Nyob hauv cov ntaub ntawv warehouses, koj tuaj yeem siv cov khoom siv los saib ua ntej thiab khaws cov ntaub ntawv sib sau xws li cov khoom muag. Cov ntsiab lus pom hauv cov cheeb tsam no feem ntau hu ua cov ntsiab lus, vim tias lawv khaws cov ntaub ntawv sau tseg. Lawv tuaj yeem siv los ua precompute koom nrog lossis tsis muaj kev sib sau.
Dab tsi yog qhov pom pom thiab yuav siv thaum twg?
Views feem ntau yog siv thaum cov ntaub ntawv yuav tsum nkag mus tsis tu ncua thiab cov ntaub ntawv hauv cov lus tau hloov kho tas li. Ntawm qhov tod tes, Materialized Views yog siv thaum cov ntaub ntawv yuav tsum tau nkag mus ntau zaus thiab cov ntaub ntawv hauv cov lus tsis tau hloov kho tas li.
Dab tsi yog qhov txiaj ntsig ntawm kev pom zoo?
qhov txiaj ntsig loj ntawm Cov Khoom Siv Saib yog nrawm nrawm heev ntawm cov ntaub ntawv sau ua ke, vim nws yog precomputed thiab khaws cia, ntawm tus nqi ntawm kev ntxig / hloov tshiab / rho tawm. Lub database yuav khaws cov Materialized View sync nrog cov ntaub ntawv tiag tiag, tsis tas yuav rov tsim lub log, cia cov ntaub ntawv ua rau koj.
Qhov twg zoo dua los yog pom pom zoo?
Materialized View teb sai dua hauv kev sib piv rau Saib. Nws yog vim hais tias cov materialized saib yog precomputed thiab li no, nws tsis nkim sij hawm nyob rau hauv kev daws cov lus nug los yog koom nyob rau hauv cov lus nug uas tsim cov Materialized View. Uas tig tau teb sai dua rau cov lus nug uas ua rau pom pom.
Vim li cas peb siv cov khoom pom hauv cov ntaub ntawv faib tawm?
Raws li nrog rau lwm cov ntaub ntawv ntawm precomputation, cov neeg siv cov ntaub ntawv feem ntau siv cov ntaub ntawv pom zoo rau qhov ua tau zoo, piv txwv li ua ib daim ntawv ntawm kev ua kom zoo. … Thaum twg cov lus nug lossis qhov hloov tshiab hais txog qhov pom zoo tib yam lub rooj virtual, DBMS hloov cov no mus rau hauv cov lus nug lossis hloov tshiab tawm tsam cov rooj hauv qab.
Pom zoo:
Cov khoom lag luam thiab cov khoom siv tau siv rau dab tsi?
Tshuaj thiab pillory Cov no tau siv rau txim rau tib neeg rau kev ua txhaum cai xws li kev cog lus lossis kev qaug dej qaug cawvCov neeg ua phem yuav zaum lossis sawv ntawm ib lub thav ntoo thiab cov neeg hauv zos yuav pov cov khoom noj lossis txawm tias pob zeb rau lawv.
Vim li cas cov kev siv nyiaj txiag thiab cov khoom siv tsis pom nyob hauv lub voj voog thib plaub?
Vim li cas cov kev siv nyiaj txiag thiab cov neeg ua lag luam tsis muaj ntsej muag nyob hauv plaub lub voj voog? Lawv ntsej muag tsis phim lawv lub siab uas tsis tuaj yeem paub qhov txawv ntawm yam khoom muaj nqis lossis tsis . Vim li cas kev rau txim ntawm cov neeg khib nyiab thiab cov neeg ua liaj ua teb haum?
Cov khoom siv thiab cov khoom siv dab tsi suav nrog hauv tsev muag?
Fittings tuaj yeem suav nrog cov khoom xws li cov rooj tog zaum dawb thiab cov khoom siv, cov khoom siv hauv chav ua noj, cov duab thiab cov iav daiFixtures, txawm li cas los xij, yuav suav nrog cov khoom siv sib xyaw, chav ua noj thiab chav ua haujlwm, ntaub pua plag, qhov rooj thiab chav dej suites, nrog rau lub boiler thiab cua sov system .
Qhov txawv ntawm cov khoom siv thiab cov khoom siv yog dab tsi?
Raws li lub npe sib txawv ntawm kev muab khoom thiab kev muab yog qhov kev muab yog ib yam khoom lossis khoom siv tau los siv rau yav tom ntej thaum muab khoom yog (tsis suav tau) qhov kev muab khoom . piv txwv ntawm kev muab yog dab tsi?
Vim li cas cov neeg siv khoom thiab cov khoom siv tau siv hauv c ++?
Lub hom phiaj ntawm kev siv getters thiab setters yog txhawm rau zais cov ntaub ntawv khaws cia thiab rov qab li casTxoj kev no, yog tias koj hloov tus cwj pwm, koj tsis tas yuav hloov tus lej. nyob rau hauv ib txhiab qhov chaw. Tab sis, yog tias koj tsis tas yuav hloov qhov kev siv, koj tau ua koj cov cai ntau dua thiab tau txais me ntsis los ntawm kev ua li ntawd .
