Cov txheej txheem:
Video: Dab tsi yog kev siv Dblink hauv Oracle?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
A database link yog ib qho khoom siv schema hauv ib lub database uas tso cai rau koj nkag mus rau cov khoom ntawm lwm lub database. Lwm database yuav tsum tsis yog ib tug Oracle Database system. Txawm li cas los xij, txhawm rau nkag mus tsis tau Oracle systems koj yuav tsum siv Oracle Heterogeneous Services.
Tom qab ntawd, ib tug kuj yuav nug, dab tsi yog qhov txuas database hauv Oracle nrog piv txwv?
A database link tso cai rau tus neeg siv lossis qhov program nkag mus database cov khoom xws li rooj thiab kev pom los ntawm lwm tus database . SELECT * NTAWM [email tiv thaiv]_link; Thaum nkag mus rau ib lub rooj tej thaj chaw deb los yog saib dhau lub database link , cov Oracle database yog ua raws li ib tug Oracle tus neeg siv khoom.
Kuj Paub, dab tsi yog lub ntsiab lus hauv Oracle? Kev piav qhia. A lub ntsiab lus yog lwm lub npe rau cov khoom xws li rooj, views, sequences, khaws cia cov txheej txheem, thiab lwm yam khoom siv database. Koj feem ntau siv cov ntsiab lus thaum koj tso cai nkag mus rau ib qho khoom los ntawm lwm lub schema thiab koj tsis xav kom cov neeg siv yuav tsum txhawj xeeb txog kev paub txog qhov twg schema yog tus tswv ntawm cov khoom.
Kuj paub, ua li cas koj tsim ib qhov txuas database?
Tsim ib pej xeem database link npe, oralink, mus rau Oracle database npe, xe, 127.0. 0.1 ntawm chaw nres nkoj 1521. Txuas mus rau Oracle database nrog username, edb, thiab password, password. Tsim PUBLIC DATABASE LINK oralink Txuas RAU edb IDENTIFIED BY 'password' SIV '//127.0.
Kuv yuav nrhiav tau qhov txuas DB hauv Oracle li cas?
2 Teb
- DBA_DB_LINKS - Txhua qhov txuas DB tau teev tseg hauv cov ntaub ntawv.
- ALL_DB_LINKS - Txhua qhov txuas DB txuas rau tus neeg siv tam sim no tau nkag mus.
- USER_DB_LINKS - Txhua qhov txuas DB uas muaj los ntawm cov neeg siv tam sim no.
Pom zoo:
Dab tsi ntawm cov hauv qab no yog qhov zoo ntawm kev siv cov khoom siv pom kev hauv kev hais lus?
Qhov txiaj ntsig tseem ceeb ntawm kev siv cov khoom siv pom hauv koj cov lus hais yog tias lawv ua kom cov neeg tuaj saib muaj kev txaus siab, hloov kev mloog ntawm tus neeg hais lus, thiab ua rau tus neeg hais lus muaj kev ntseeg siab ntau dua hauv kev nthuav qhia tag nrho
Dab tsi yog qhov txawv ntawm cov neeg siv kev paub thiab kev paub ntawm cov neeg siv khoom?
User Experience (UX) cuam tshuam nrog tib neeg cuam tshuam nrog koj cov khoom thiab cov kev paub uas lawv tau txais los ntawm kev sib cuam tshuam. Customer Experience (CX), incontrast, encompasses tag nrho cov kev sib cuam tshuam ib tug neeg muaj nrog koj hom
Cov kev txwv piav qhia qee qhov kev txwv siv hauv Oracle yog dab tsi?
Cov kev txwv Oracle tau txhais raws li cov cai los khaws cov ntaub ntawv ncaj ncees hauv daim ntawv thov. Cov kev cai no yog tsim rau ib kem ntawm ib lub rooj database, thiaj li los txhais cov txheej txheem coj tus cwj pwm ntawm ib kem ntawm lub rooj thiab xyuas qhov dawb huv ntawm cov ntaub ntawv ntws mus rau hauv nws
Dab tsi yog kev siv SAVE kev zam hauv Oracle?
Nqe lus piav qhia Ntxiv cov SAVE EXCEPTIONS clause rau koj FORALL nqe lus thaum koj xav kom lub PL / SQL runtime engine los ua tag nrho cov DML nqe lus generated los ntawm FORALL, txawm yog ib tug los yog ntau tshaj ua tsis tau tejyam. Yog tias koj siv INDICES OF, koj yuav tsum tau ua tib zoo saib xyuas kom pom koj txoj hauv kev rov qab mus rau nqe lus ua txhaum cai
Dab tsi yog kev siv cov ntawv cim kev cai li cas koj nkag mus rau hauv Apex cov chav kawm thiab hauv Visualforce nplooj ntawv?
Cov ntawv sau kev cai tso cai rau cov neeg tsim khoom tsim cov ntawv thov ntau hom lus los ntawm kev nthuav qhia cov ntaub ntawv (piv txwv li, pab cov ntawv lossis cov lus yuam kev) hauv tus neeg siv hom lus. Cov ntawv sau kev cai yog cov ntawv sau muaj txiaj ntsig uas tuaj yeem nkag tau los ntawm Apex cov chav kawm, nplooj ntawv Visualforce, lossis cov khoom siv xob laim