Video: Dab tsi yog tag nrho load thiab incremental load hauv SSIS?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Muaj ob txoj hauv kev tseem ceeb rau thauj cov ntaub ntawv nyob rau hauv lub warehouse: Tag nrho cov load : tag nrho cov ntaub ntawv pov tseg uas tshwm sim thawj zaug uas cov ntaub ntawv tau muab tso rau hauv lub tsev khaws khoom. Incremental load : delta nruab nrab ntawm lub hom phiaj thiab cov ntaub ntawv tau muab pov tseg ntawm qhov tsis tu ncua.
Qhov sib thooj, qhov nce ntxiv hauv SSIS yog dab tsi?
Incremental Load in SSIS . SSIS Incremental Load txhais tau hais tias muab piv rau lub hom phiaj lub rooj tawm tsam cov ntaub ntawv los ntawm Id lossis Date Stamp lossis Time Stamp. Yog tias muaj cov ntaub ntawv tshiab nyob rau hauv Cov ntaub ntawv Cov ntaub ntawv, ces peb yuav tsum tau ntxig cov ntaub ntawv hauv lub hom phiaj. Piv txwv li, txhua txhua hnub, peb yuav tsum tau ntxig cov ceg muag khoom ntse.
Kuj Paub, dab tsi yog tag nrho load thiab delta load? Tag nrho cov load yog thaum koj thauj cov ntaub ntawv rau hauv BI thawj zaug piv txwv li koj tab tom seeding lub hom phiaj BI khoom nrog thawj cov ntaub ntawv. A delta cov ntaub ntawv thauj txhais tau tias koj yog leej twg thauj khoom hloov mus rau cov ntaub ntawv uas twb muaj lawm los yog ntxiv kev hloov pauv tshiab.
Ib sab saum toj, dab tsi yog qhov nce ntxiv hauv ETL?
Incremental load yog txhais raws li kev ua ntawm thauj khoom tsuas yog cov ntaub ntawv tshiab lossis hloov kho tshiab los ntawm cov ntaub ntawv mus rau hauv QVD tsim. Ntxiv loads muaj txiaj ntsig vim lawv khiav tau zoo heev thaum piv rau tag nrho loads , tshwj xeeb tshaj yog rau cov ntaub ntawv loj.
Dab tsi yog tag nrho load thiab pib load?
Load tag nrho : Ua tiav tag nrho cov ntaub ntawv hauv qhov chaw mus rau lub hom phiaj. Pib Load : Thawj khiav qhov twg koj yuav tsum ua cov keeb kwm thauj mus rau lub hom phiaj thiab tom qab ntawd koj yuav tsum incremental thauj (tsuas yog hloov kho thiab cov ntaub ntawv tshiab).
Pom zoo:
Dab tsi yog qhov txawv ntawm tag nrho cov ntawv tshaj tawm thiab ib nrab ntawm cov xwm txheej?
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