Dab tsi yog qhov zoo tsis zoo ntawm lub hnub qub schema?
Dab tsi yog qhov zoo tsis zoo ntawm lub hnub qub schema?

Video: Dab tsi yog qhov zoo tsis zoo ntawm lub hnub qub schema?

Video: Dab tsi yog qhov zoo tsis zoo ntawm lub hnub qub schema?
Video: Ntsaim Vaj - Tsis Tshuav Dab Tsis Zoo Lawm (New Official MV 2023) 2024, Kaum ib hlis
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Lub ntsiab qhov tsis zoo ntawm lub hnub qub schema yog tias cov ntaub ntawv ncaj ncees tsis zoo-tsim vim nws lub xeev denormalized. Lub hnub qub schemas tsis yooj yim txhawb ntau-rau-ntau txoj kev sib raug zoo ntawm cov chaw lag luam. Feem ntau cov kev sib raug zoo no yooj yim hauv ib lub hnub qub schema nyob rau hauv thiaj li yuav ua raws li qhov yooj yim dimensional qauv.

Xav txog qhov no, dab tsi yog lub hnub qub schema qhov twg nws siv thiab nws qhov zoo?

Star Schema Qhov Zoo Vim a lub hnub qub schema database muaj ib tug me me ntawm cov ntxhuav thiab meej koom txoj kev, queries khiav ceev tshaj lawv ua tawm tsam ib tug OLTP system. Cov lus nug me me hauv ib lub rooj, feem ntau ntawm cov rooj loj, yuav luag tam sim.

Qhov thib ob, kev siv lub hnub qub schema yog dab tsi? A lub hnub qub schema yog daim duab los ntawm ib puag ncig txhua qhov tseeb nrog nws qhov sib txuas. Daim duab tshwm sim zoo li a hnub qub . Lub hnub qub schemas yog optimized rau querying loj cov ntaub ntawv teev thiab siv nyob rau hauv cov ntaub ntawv warehouses thiab cov ntaub ntawv marts los txhawb OLAP cubes, lag luam txawj ntse thiab analytic daim ntaub ntawv, thiab ad hoc queries.

Ib yam li ntawd, qhov zoo ntawm snowflake schema yog dab tsi?

Muaj ob lub ntsiab qhov zoo mus rau snowflake schema : Cov ntaub ntawv zoo dua qub (cov ntaub ntawv ntau dua, yog li cov ntaub ntawv muaj teeb meem txo qis) tsawg dua qhov chaw disk siv tom qab ntawd hauv cov qauv denormalized.

Dab tsi yog lub hnub qub zoo dua lossis snowflake schema?

Cov Lub hnub qub schema muab cov lus teb ceev ceev rau cov lus nug thiab yog qhov zoo tshaj plaws rau lub voos xwmfab. Kawm tag nrho txog Lub hnub qub schema nyob rau hauv tsab xov xwm no. Cov Snowflake qauv loads cov ntaub ntawv marts thiab yog li txoj hauj lwm ETL yog ntau nyuaj hauv kev tsim thiab tsis tuaj yeem ua piv txwv vim tias tus qauv kev vam khom txwv nws.

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