Dab tsi yog qhov sib txawv ntawm pawg thiab tsis suav nrog hauv SQL Server?
Dab tsi yog qhov sib txawv ntawm pawg thiab tsis suav nrog hauv SQL Server?

Video: Dab tsi yog qhov sib txawv ntawm pawg thiab tsis suav nrog hauv SQL Server?

Video: Dab tsi yog qhov sib txawv ntawm pawg thiab tsis suav nrog hauv SQL Server?
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Clustered indexes muab khaws cia rau ntawm lub rooj. Qhov no txhais tau tias lawv yog tus ceev tshaj plaws thiab koj tuaj yeem muaj ib qho xwb pawg index rau lub rooj. Tsis-clustered indexes muab khaws cia nyias, thiab koj tuaj yeem muaj ntau npaum li koj xav tau. Qhov kev xaiv zoo tshaj plaws yog teem koj tus kheej pawg index ntawm feem ntau siv tshwj xeeb kem, feem ntau yog PK.

Ib yam li ntawd, koj tuaj yeem nug, qhov txawv ntawm ib pawg thiab qhov ntsuas tsis suav nrog yog dab tsi?

1) A Clustered Index lub cev txheeb txhua kab thaum Non-clustered Index tsis yog. 2) Hauv SQL, ib lub rooj tsuas muaj ib qho xwb Clustered Index tab sis tsis muaj kev txwv li ntawd NonClustered Index . 3) Hauv ntau cov ntaub ntawv sib raug zoo, Clustered Index yog cia li tsim nyob rau hauv lub ntsiab tseem ceeb kem.

Ib yam li ntawd, kev siv qhov ntsuas tsis yog pawg hauv SQL Server yog dab tsi? Taw qhia rau SQL Server tsis - pawg indexes A tsis suav nrog index yog cov qauv ntaub ntawv uas txhim kho qhov ceev ntawm cov ntaub ntawv rov qab los ntawm cov ntxhuav. Tsis zoo li ib pawg index , a tsis suav nrog index txheeb thiab khaws cov ntaub ntawv cais los ntawm cov kab ntawv hauv cov lus.

Tsis tas li ntawd nug, dab tsi yog clustered thiab nonclustered indexes hauv SQL Server?

A pawg index yog hom tshwj xeeb ntawm qhov ntsuas uas reorders txoj kev cov ntaub ntawv nyob rau hauv lub rooj yog lub cev khaws cia. Cov nplooj ntawm a pawg index muaj cov nplooj ntawv cov ntaub ntawv. A tsis suav nrog index yog hom tshwj xeeb ntawm qhov ntsuas nyob rau hauv uas lub logic kev txiav txim ntawm lub qhov ntsuas tsis phim lub cev khaws cia ntawm cov kab ntawm disk.

Dab tsi yog qhov sib txawv indexes siv hauv SQL Server Dab tsi yog qhov txawv ntawm lawv?

Index yog siv kom ceev-up query txheej txheem nyob rau hauv SQL Server , ua rau muaj kev ua haujlwm siab. Ntawm qhov tod tes, yog tias koj tsim indexes , database mus rau qhov ntawd qhov ntsuas ua ntej thiab tom qab ntawd muab cov ntaub ntawv sib tham ncaj qha. Muaj ob hom ntawm Index hauv SQL Server : Ua pawg Index.

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