Kev sib txuam mus kom ze rau kev tsim cov ntaub ntawv teev cov ntsiab lus ua haujlwm nrog tabular cov qauv ntaub ntawv, uas yog, nrog txoj kev nthuav qhia ib txwm muaj. Nws yog nqis tes siv kev tswj hwm qhov system.
Qhov tseem ceeb ntawm cov qauv kev sib txuam thiab cov ntaub ntawv npaj
Txhua qhov chaw khaws ntaub ntawv raug muab teeb tsa thiab txheej txheem cov ntaub ntawv khaws cia rau hauv ib lossis ntau lub rooj. Cov Ntxhuav yog cov muaj ntuj thiab muaj neeg paub txog ntawm cov ntaub ntawv, muaj cov kab thiab kem. Txoj kev sib ze txhais tau tias muaj qee qhov kev sib raug zoo ntawm cov ntxhuav ntawd. Cov kab txuas lossis kev sib raug zoo pub koj los ua ke, khaws cov ntaub ntawv los ntawm ob peb lub rooj ntawm ib zaug hauv ib nqe lus nug.
Txhawm rau tsim kom muaj kev txheeb xyuas cov ntaub ntawv, nws yog qhov tsim nyog, ua ntej ntawm tag nrho, los tsim cov teeb txheej thiab kev sib raug zoo ntawm lawv. Hauv qhov no, koj yuav tsum tau ua raws li txoj cai hauv qab no. Ua ntej, txhua lub rooj yuav tsum yog tib hom thiab muaj lub npe tsis sib xws. Thib ob, Cov kab ntawm lub rooj yuav tsum muaj qhov chaw ntawm cov teb thiab tus nqi (koj tsis tuaj yeem suav ntau kab lus thiab rov ua pawg). Thib peb, txoj hlua yuav tsum yog tsawg kawg ib qho muaj nuj nqis (teb) sib txawv ntawm txhua lwm yam txhawm rau txhawm rau txhawm rau txhawm rau txheeb xyuas txoj hlua twg. Thib plaub, cov kem yuav tsum muaj cov npe tshwj xeeb thiab tau sau nrog cov ntaub ntawv tsis tseem ceeb, tsuas yog txoj hauv kev ntawm kev nthuav qhia yog cov ntaub ntawv qhia tau meej meej (muaj peev xwm tsis muaj kev sib raug zoo tshwj xeeb ntawm cov ntxhuav).
Koj tuaj yeem ua cov ntaub ntawv los ntawm ntau cov ntxhuav ib zaug los ntawm kev xaiv cov kev xaiv rau hauv lub rooj ib ntus. Cov haujlwm feem ntau yog kev xaiv, kev twv tawm, koom nrog ntuj, koom siab, kev sib tshuam, thiab qhov sib txawv. Thaum tsim cov rooj, ib qho ntawm cov ntsiab lus tseem ceeb yog thawj qhov tseem ceeb - nws yog lub cim uas tsis pom tseeb hais txog qhov chaw ua haujlwm. Piv txwv li, hauv lub rooj ntawm tais diav, thawj qhov tseem ceeb yuav yog tus naj npawb tais diav. Rau txhua lub rooj nrog cov ntaub ntawv, koj yuav tsum tsim cov yawm sij zoo sib xws, txuas rau lawv nrog kev sib raug zoo.
Kev siv siv DBMS
Cov ntaub ntawv tswj kev tswj hwm (Oracle, MySQL, SQLite, thiab lwm yam) muab kev tswj tiav ntawm cov ntaub ntawv tsim tawm thiab tso cai rau koj ua cov lus nug. Tau xaiv ib qho ntawm DBMS, koj yuav tsum hloov cov ntxhuav tau tsim rau cov program kawm raws nws cov ntawv cim. Qhov no yog qhov kev ua haujlwm voluminous uas yuav tsum tau ua kom zoo zoo yam tsis tas ploj ntawm cov cwj pwm tseem ceeb.
Ntxiv mus ua haujlwm nrog cov lus nug thiab ua cov ntaub ntawv raws li SQL lus hom lus. Nws yog nyob rau hauv hom lus no uas cov ntxhuav tau tsim, cov ntaub ntawv raug ntxiv, tshem tawm thiab hloov pauv, cov ntaub ntawv raug muab los ntawm ib lossis ntau rooj, thiab cov qauv raug hloov.
