Dab tsi yog Relational database Quizlet?
Dab tsi yog Relational database Quizlet?

Video: Dab tsi yog Relational database Quizlet?

Video: Dab tsi yog Relational database Quizlet?
Video: Dab neeg Tus taug kev los tsis yog kuv txiv yog dab xwb 2024, Kaum ib hlis
Anonim

Relational Database . A database muaj ntau tshaj ob lub rooj sib tham. Cov kev sib raug zoo nruab nrab ntawm cov ntxhuav yog tsim los ntawm kev tso ib qho tseem ceeb ntawm lub hauv paus rau hauv lub rooj thib ob. Database Rooj. Database cov rooj khw muag khoom hauv kab thiab cov ntaub ntawv nyob rau hauv ib lub koom haum.

Hais txog qhov no, koj txhais li cas los ntawm kev sib raug zoo database?

A kev sib txheeb database yog ib txheej txheej ntawm cov lus piav qhia los ntawm cov ntaub ntawv tuaj yeem nkag mus lossis rov sib sau ua ke hauv ntau txoj hauv kev yam tsis tas yuav hloov kho cov ntaub ntawv. database rooj. Tus txheej txheem neeg siv thiab daim ntawv thov programming interface (API) ntawm a kev sib txheeb database yog Structured Query Language (SQL).

Qhov thib ob, puas yog cov ntaub ntawv nyob rau hauv cov ntaub ntawv sib txuas lus nug? Hauv computer science, cov ntaub ntawv uas muaj ntau qhov chaw, hu ua a sau tseg , tuaj yeem muab faib ua teb. Relational databases npaj cov ntaub ntawv ua sets cov ntaub ntawv database , kuj hu kab . Txhua sau tseg muaj ntau lub teb; cov teb ntawm txhua tus cov ntaub ntawv tsim cov kab.

Ib tug kuj yuav nug, leej twg ntawm cov hauv qab no txhais cov ntaub ntawv sib raug zoo?

A kev sib txheeb database yog ib qho kev sau ntawm cov ntaub ntawv nrog pre- txhais kev sib raug zoo ntawm lawv. Cov no cov khoom raug teeb tsa raws li cov rooj sib tham nrog kab thiab kab. Txhua kab hauv ib lub rooj tuaj yeem raug cim nrog tus cim tshwj xeeb hu ua tus yuam sij tseem ceeb, thiab kab ntawm ntau lub rooj tuaj yeem ua rau muaj feem cuam tshuam nrog cov yuam sij txawv teb chaws.

Yuav ua li cas yog vim li cas rau tsim ib tug relational database?

Cov txiaj ntsig tseem ceeb ntawm cov kev sib txheeb database mus kom ze yog lub peev xwm tsim cov ntaub ntawv tseem ceeb los ntawm kev koom nrog cov rooj. Koom nrog cov rooj tso cai rau koj nkag siab txog kev sib raug zoo ntawm cov cov ntaub ntawv , los yog li cas cov rooj sib txuas. SQL suav nrog lub peev xwm suav, ntxiv, pab pawg, thiab tseem muab cov lus nug.

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