Cov txheej txheem:
Video: Kuv yuav ua li cas los tsim ib kem thawj tus yuam sij hauv SQL Server?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Siv SQL Server Management Studio
- Hauv Object Explorer, right-click lub rooj uas koj xav tau ntxiv ib qho kev txwv tshwj xeeb, thiab nyem Tsim.
- Hauv Table Designer, nyem kab xaiv rau cov ntaub ntawv kem koj xav txhais li tus thawj tus yuam sij .
- Right-click tus kab xaiv rau qhov kem thiab xaiv Set Lub Ntsiab Tseem Ceeb .
Kuj paub, kuv yuav ntxiv tus yuam sij li cas rau lub rooj uas twb muaj lawm?
Txhawm rau ntxiv cov yuam sij tseem ceeb siv Control Center:
- Nthuav cov khoom ntoo kom txog thaum koj pom Tables folder.
- Right-click lub rooj koj xav hloov kho, thiab xaiv Alter los ntawm cov ntawv qhia zaub mov pop-up.
- Ntawm nplooj ntawv Keys, xaiv ib lossis ntau kab ua tus yuam sij tseem ceeb.
- Yeem: Sau lub npe txwv ntawm tus yuam sij tseem ceeb.
Tsis tas li ntawd, yuav ua li cas thiaj tsim kab Identity hauv SQL Server? Tsim ib kem tus kheej los ntawm kev tsim lub rooj yam tsis muaj cov ntaub ntawv poob
- Tsim ib lub rooj ib ntus nrog rau kab ntawv tus kheej.
- Luam cov ntaub ntawv los ntawm thawj lub rooj rau hauv lub rooj ib ntus.
- Tso lub rooj qub.
- Rename lub rooj ib ntus mus rau lub npe lub rooj qub.
Tom qab ntawd, lo lus nug yog, dab tsi yog qhov tseem ceeb hauv SQL nrog piv txwv?
Tus yuam sij tseem ceeb yog qhov chaw hauv a rooj uas tshwj xeeb txheeb xyuas txhua kab / cov ntaub ntawv hauv cov ntaub ntawv rooj . Cov yuam sij tseem ceeb yuav tsum muaj cov txiaj ntsig tshwj xeeb. Ib kab ntawv tseem ceeb tsis tuaj yeem muaj NULL qhov tseem ceeb. A rooj tuaj yeem muaj tsuas yog ib qho tseem ceeb, uas yuav muaj xws li ib qho lossis ntau qhov chaw.
Peb puas tuaj yeem hloov kho qhov tseem ceeb?
Thaum tsis muaj dab tsi li yuav tiv thaiv koj ntawm hloov kho a thawj tus yuam sij (tshwj tsis yog kev txwv kev ncaj ncees), nws yuav tsis yog ib lub tswv yim zoo: Los ntawm kev ua tau zoo ntawm kev pom: Koj yuav xav tau hloov tshiab tag nrho txawv teb chaws cov yuam sij uas reference the hloov tshiab tus yuam sij . Ib leeg hloov tshiab tau coj mus rau hloov tshiab ntawm tej zaum muaj ntau lub rooj / kab.
Pom zoo:
Ib tus yuam sij tseem ceeb puas tuaj yeem muaj ob tus yuam sij txawv teb chaws?
Nws yog qhov zoo kawg nkaus kom muaj ob kab ntawv tseem ceeb txawv teb chaws xa mus rau tib lub ntsiab lus tseem ceeb hauv ib lub rooj sib txawv vim tias txhua tus nqi tseem ceeb txawv teb chaws yuav siv cov ntaub ntawv sib txawv hauv cov lus hais
Dab tsi yog tus yuam sij ntiag tug thiab pej xeem tus yuam sij hauv Blockchain?
Thaum ib tug neeg xa koj cryptocoins hla Blockchain, lawv tau xa lawv mus rau qhov hashed version ntawm qhov hu ua "Public Key". Muaj lwm tus yuam sij uas zais ntawm lawv, uas yog hu ua "Private Key." Qhov Private Key no yog siv los muab Public Key
Koj txhais li cas los ntawm tus yuam sij ntiag tug thiab pej xeem tus yuam sij cryptography?
Nyob rau hauv pej xeem tus yuam sij cryptography, ob tus yuam sij yog siv, ib tug yuam sij yog siv rau encryption thiab thaum lwm yam yog siv rau decryption. 3. Nyob rau hauv private keycryptography, tus yuam sij yog khaws cia tsis pub leejtwg paub. Nyob rau hauv pej xeem tus yuam sij cryptography, ib qho ntawm ob tus yuam sij yog khaws cia tsis pub leejtwg paub
Puas yog tus yuam sij tseem ceeb kuj yog tus yuam sij txawv teb chaws?
Cov yuam sij tseem ceeb ib txwm yuav tsum muaj qhov tshwj xeeb, cov yuam sij txawv teb chaws yuav tsum tso cai rau qhov tsis muaj txiaj ntsig yog tias lub rooj yog ib qho kev sib raug zoo. Nws yog qhov zoo kawg nkaus siv tus yuam sij txawv teb chaws los ua tus yuam sij tseem ceeb yog tias lub rooj sib txuas los ntawm kev sib raug zoo ib leeg, tsis yog ib qho kev sib raug zoo
Ib tus yuam sij txawv teb chaws puas tuaj yeem siv lwm tus yuam sij txawv teb chaws?
1 Teb. Tus yuam sij txawv teb chaws tuaj yeem siv txhua qhov chaw uas txhais tau tias nws txawv. Yog hais tias qhov tshwj xeeb teb yog nws tus kheej txhais tau tias yog tus yuam sij txawv teb chaws, nws tsis txawv. Yog tias nws yog thaj chaw tshwj xeeb, nws kuj tuaj yeem yog lub hom phiaj ntawm lwm FK