Cov txheej txheem:
- Kuv yuav tsum siv GUID lossis int rau thawj tus yuam sij?
- Thaum twg koj yuav tsum siv GUID?
- Yuav ua li cas hom ntaub ntawv yuav tsum tau siv rau thawj tus yuam sij?
- Puas yog siv hlua ua thawj tus yuam sij?
Video: Kuv yuav tsum siv cov lus qhia ua tus yuam sij tseem ceeb?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
GUIDs yuav zoo li yog qhov kev xaiv ntuj rau koj tus yuam sij tseem ceeb - thiab yog tias koj xav tau tiag tiag, koj tuaj yeem sib cav siv nws rau PRIMARY KEY ntawm lub rooj. Qhov kuv xav kom tsis txhob ua yog siv GUID kem ua tus yuam sij clustering, uas SQL Server ua los ntawm lub neej ntawd, tshwj tsis yog koj qhia tshwj xeeb tias nws tsis ua.
Kuv yuav tsum siv GUID lossis int rau thawj tus yuam sij?
int yog me dua, nrawm dua, nco tau yooj yim, khaws cov kab ke raws sijhawm. Thiab raws li rau Guid, qhov zoo dua kuv pom yog qhov tshwj xeeb. Nyob rau hauv rooj plaub twg daim ntawv qhia yuav zoo dua thiab int thiab vim li cas? Los ntawm qhov kuv tau pom, int tsis muaj qhov tsis zoo tsuas yog los ntawm tus lej txwv, uas feem ntau tsis cuam tshuam.
Thaum twg koj yuav tsum siv GUID?
Koj siv nws nyob txhua qhov chaw uas koj xav tau tus cim uas tau lees tias yuav txawv dua li lwm tus. GUIDs feem ntau yog siv thaum koj yuav tau txhais tus ID uas yuav tsum txawv ntawm tus ID uas lwm tus neeg (sab nraum koj tswj) yuav txhais tauIb qho chaw hauv Interface tus cim ntawm ActiveX tswj.
Yuav ua li cas hom ntaub ntawv yuav tsum tau siv rau thawj tus yuam sij?
Integer (number) cov ntaub ntawv hom yog qhov kev xaiv zoo tshaj plaws rau thawj tus yuam sij, ua raws li cov ntaub ntawv ntev-ntev cov cim. SQL neeg rau zaub mov ua cov lej cov ntaub ntawv muaj txiaj ntsig sai dua li cov cim cov ntaub ntawv yam tseem ceeb vim nws hloov cov cim rau ASCII qhov sib npaug ua ntej ua, uas yog ib kauj ruam ntxiv.
Puas yog siv hlua ua thawj tus yuam sij?
Cov lus teb luv luv: Nws zoo kawg nkaus siv txoj hlua ua tus yuam sij tseem ceeb.
Pom zoo:
Kuv yuav tsum siv lo lus tseem ceeb hauv c?
Siv C zoo li lo lus tseem ceeb sab nraud ntawm kev ua haujlwm Nyob rau hauv cov ntsiab lus no nws txwv lawv qhov kev pom rau cov ntaub ntawv tam sim no (kev txhais lus tau meej dua ntawm no). Qhov no txhais tau tias peb tsis tuaj yeem nkag mus rau qhov muaj nuj nqi zoo li qub lossis hloov pauv los ntawm lwm cov ntaub ntawv.
Ntawm cov lus qhia tseem ceeb uas txhawb nqa tus kws qhia kev noj qab haus huv?
Ntawm cov lus qhia muaj txiaj ntsig uas txhawb nqa tus kws qhia kev noj qab haus huv Cov lus nug tam sim es tsis yog kev kho tus kws qhia ntawv txhawb nqa cov tub ntxhais kawm muaj tswv cuab ntau dua li cov txheej txheem kho. Yog tias cov tub ntxhais kawm tau txais lub sijhawm kawm uas xav tau los koom nrog kev kos npe, tom qab ntawd cov lej cim tau zoo ib yam li cov lus sau.
Vim li cas tus yuam sij tseem ceeb hauv dbms?
Ib tus yuam sij tseem ceeb yog qhov tshwj xeeb kev sib raug zoo ntawm cov rooj sib tham (lossis kev sib txuas ntawm txhua kab) tsim los txheeb xyuas txhua lub rooj cov ntaub ntawvTus yuam sij tseem ceeb yog siv los ua tus cim tshwj xeeb kom nrawm nrawm cov ntaub ntawv hauv lub rooj.
Yuav tsum yog tus yuam sij tseem ceeb yog qhov tshwj xeeb?
Tus yuam sij tseem ceeb yuav tsum yog qhov tshwj xeeb. Tus yuam sij tshwj xeeb tsis tas yuav yog tus yuam sij tseem ceeb - saib tus neeg sib tw tus yuam sij. Qhov ntawd yog, tej zaum yuav muaj ntau tshaj ib qho kev sib txuas ntawm kab ntawm ib lub rooj uas tuaj yeem txheeb xyuas ib kab - tsuas yog ib qho ntawm cov no tuaj yeem xaiv los ua tus yuam sij tseem ceeb .
Kuv yuav tsum siv cov txuj ci tseem ceeb ntawm cov zaub?
Raws li Miracle-Gro, Txhua Lub Hom Phiaj formula yog muaj kev nyab xeeb tag nrho rau zaub … Miracle-Gro yog feem ntau-paub rau nws cov dej-soluble mis, tab sis lub hom kuj muaj cov kab organic thiab cov khoom lag luam rau cov qoob loo zaub.
