Lub logic database yog dab tsi?
Lub logic database yog dab tsi?

Video: Lub logic database yog dab tsi?

Video: Lub logic database yog dab tsi?
Video: Koj lub siab yog dab tsi ua? 8/3/2017 2024, Kaum ib hlis
Anonim

Logical databases yog tshwj xeeb ABAP cov kev pab cuam uas khaws cov ntaub ntawv thiab ua rau nws muaj nyob rau hauv daim ntawv thov kev pab cuam. Feem ntau siv ntawm logical databases tseem yuav nyeem datafrom database cov ntxhuav thiab koom nrog lawv nrog ABAPprograms ua tau zoo thaum txhais cov ntsiab lus ntawm qhov kev zov me nyuam.

Dhau li ntawm qhov no, dab tsi yog qhov laj thawj qauv ntawm database?

A logical cov ntaub ntawv qauv los yog logical schema yog cov ntaub ntawv qauv ntawm ib qho teeb meem tshwj xeeb uas tau hais tawm ntawm nws tus kheej ntawm ib qho tshwj xeeb database tswj cov khoom lossis kev khaws cia technology (lub cev cov ntaub ntawv qauv) tab sis hais txog cov ntaub ntawv cov qauv xws li cov rooj sib tham thiab kab, cov chav kawm taw qhia, lossis XML cim npe.

Dhau li ntawm saum toj no, dab tsi yog qhov chaw logic? Logical entities sawv cev "yam" noj los yog tsim los ntawm logical kev ua si. Nws sawv cev ib yam dab tsi ntawm tus nqi rau lub system nyob rau hauv kev kawm, yog li ntawd lub qhov chaw tej zaum yuav tsis muaj tseeb. Cov no yog cov cai ua lag luam thiab yuav tsum tau txhais sab nraud rau cov koom haum thiab workflow-lawv cais cov khoom lawv tus kheej.

Xav txog qhov no, dab tsi yog qhov laj thawj database hauv SAP?

Logical Databases yog tshwj xeeb ABAP cov kev pab cuam uas retrieve cov ntaub ntawv thiab ua kom nws muaj toapplication programs. Cov logical database nyeem cov cov ntaub ntawv , khaws cia rau hauv qhov kev zov me nyuam yog tias tsim nyog, thiab tom qab ntawd hla lawv kab los ntawm kab mus rau daim ntawv thov kev pab cuam lossis lub functionmodule LDB_PROCESS siv thaj chaw ua haujlwm interface.

Dab tsi yog lub hom phiaj ntawm kev tsim cov qauv tsim qauv logical?

A logical cov ntaub ntawv qauv muab tag nrho cov ntaub ntawv hais txog ntau lub koom haum thiab kev sib raug zoo ntawm cov koom haum tam sim no hauv a database.

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