Video: Cov ntaub ntawv nkag mus rau hauv ib daim teb hu ua dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov ntaub ntawv Hom. Tus yam ntxwv uas txhais cov hom cov ntaub ntawv uas tau nkag mus rau hauv ib lub teb , xws li tus lej, ntawv nyeem, lossis hnub tim. Database. Kev sib sau ua ke ntawm qhov tseeb txog tib neeg, xwm txheej, yam, lossis cov tswv yim ntsig txog rau ib lub ncauj lus tshwj xeeb lossis lub hom phiaj.
Nyob rau hauv no txoj kev, dab tsi yog ib daim teb nyob rau hauv ib tug database?
1) Ib a database tab,a teb yog ib tug qauv ntaub ntawv rau ib daim ntawm cov ntaub ntawv. Teb tau muab tso rau hauv cov ntaub ntawv, uas muaj tag nrho cov ntaub ntawv nyob rau hauv lub rooj uas muaj feem xyuam rau ib qho chaw tshwj xeeb.
Ib yam li ntawd, dab tsi yog daim teb hauv kev nkag? A teb hauv Microsoft Nkag mus yog ib daim ntaub ntawv hais txog ib tug neeg los yog yam khoom. Hais txog teb yog pab pawg ua ke los ua ib daim ntawv teev tseg. Hauv ib lub chaw khaws ntaub ntawv, qhov twg cov ntaub ntawv hais txog lub tuam txhab cov ntaub ntawv cov neeg ua haujlwm khaws cia, cov ntaub ntawv yuav yog cov ntaub ntawv ntsig txog ib tus neeg ua haujlwm.
Hais txog qhov no, daim teb thiab cov ntaub ntawv yog dab tsi?
Teb thiab cov ntaub ntawv yog ob qho tseem ceeb ntawm cov ntaub ntawv database, uas yog kev sib sau ua ke ntawm cov ntaub ntawv, lossis cov ntaub ntawv. Lub sij hawm " teb " hais txog kab, lossis ntsug pawg ntawm cov ntaub ntawv; lub sij hawm " cov ntaub ntawv " hais txog kab, lossis kab rov tav pawg ntawm cov cim teb cov ntaub ntawv. Phau ntawv xov tooj yog ib qho piv txwv ntawm cov ntaub ntawv.
Lub hom phiaj ntawm cov ntaub ntawv cov cuab yeej rau ib daim teb yog dab tsi?
Txhua teb hauv ib lub rooj muaj khoom thiab cov no khoom txhais cov teb yam ntxwv thiab tus cwj pwm. Qhov tseem ceeb tshaj plaws vaj tse rau teb yog nws hom ntaub ntawv . A teb cov ntaub ntawv hom txiav txim seb yam twg cov ntaub ntawv nws tuaj yeem khaws cia. Cov hom ntaub ntawv txiav txim siab yam khoom muaj nqis uas cov neeg siv tuaj yeem khaws cia rau hauv ib qho twg teb.
Pom zoo:
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