Dab tsi yog phau ntawv txhais lus cov ntaub ntawv hauv kev tshawb fawb?
Dab tsi yog phau ntawv txhais lus cov ntaub ntawv hauv kev tshawb fawb?

Video: Dab tsi yog phau ntawv txhais lus cov ntaub ntawv hauv kev tshawb fawb?

Video: Dab tsi yog phau ntawv txhais lus cov ntaub ntawv hauv kev tshawb fawb?
Video: 6 Nqi Lus Qhia Kev Ua neej ( leej twg mloog lub neej yuav zoo tuaj) 2024, Kaum ib hlis
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A Cov ntaub ntawv phau ntawv txhais lus Txhais

A Cov ntaub ntawv phau ntawv txhais lus yog ib phau ntawm cov npe, txhais, thiab cwj pwm txog cov ntaub ntawv cov ntsiab lus uas tau siv los yog ntes nyob rau hauv ib lub database, cov ntaub ntawv system, los yog ib feem ntawm a kev tshawb fawb qhov project. A Cov ntaub ntawv phau ntawv txhais lus kuj muab metadata txog cov ntaub ntawv cov ntsiab lus.

Cov lus nug tseem yog, dab tsi yog phau ntawv txhais lus cov ntaub ntawv thiab nws lub hom phiaj yog dab tsi?

A cov ntaub ntawv phau ntawv txhais lus yog ib phau ntawm kev piav qhia ntawm lub cov ntaub ntawv cov khoom lossis cov khoom hauv a cov ntaub ntawv qauv rau cov txiaj ntsig ntawm cov programmers thiab lwm tus uas yuav tsum tau xa mus rau lawv. Thawj kauj ruam hauv kev txheeb xyuas cov khoom siv uas cov neeg siv sib cuam tshuam yog txhawm rau txheeb xyuas txhua yam khoom thiab nws kev sib raug zoo rau lwm yam khoom.

Qhov thib ob, dab tsi yog phau ntawv txhais lus cov ntaub ntawv hauv database? A cov ntaub ntawv phau ntawv txhais lus yog ib cov ntaub ntawv los yog ib pawg ntawm cov ntaub ntawv uas muaj a database cov metadata. Cov cov ntaub ntawv phau ntawv txhais lus muaj cov ntaub ntawv hais txog lwm yam khoom hauv lub database , zoo li cov ntaub ntawv kev ua tswv cuab, cov ntaub ntawv kev sib raug zoo rau lwm yam khoom, thiab lwm yam cov ntaub ntawv.

Yog li ntawd, dab tsi yog qhov piv txwv ntawm phau ntawv txhais lus?

19.11 Cov ntaub ntawv phau ntawv txhais lus A cov ntaub ntawv phau ntawv txhais lus yog qhov chaw khaws cia hauv nruab nrab ntawm metadata. Metadata yog cov ntaub ntawv txog cov ntaub ntawv . Ib txhia piv txwv ntawm yam uas yuav muaj nyob rau hauv ib lub koom haum cov ntaub ntawv phau ntawv txhais lus suav nrog: Cov cov ntaub ntawv hom, e.g., integer, tiag, tus cwj pwm, thiab cov duab ntawm txhua qhov chaw hauv lub koom haum cov ntaub ntawv.

Dab tsi yog phau ntawv txhais lus cov ntaub ntawv hauv Excel?

A cov ntaub ntawv phau ntawv txhais lus yog ib lub ntsiab lus ntawm cov ntxhuav/cov ntaub ntawv thiab kab/teb nyob rau hauv a cov ntaub ntawv teeb (database, cov ntaub ntawv warehouse los yog cov ntaub ntawv pas dej).

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