Data Validation vs Data Verification
Cov ntaub ntawv yog cov cuab tam tseem ceeb tshaj plaws rau txhua lub koom haum. Yog li ntawd, nws yuav tsum tau ua kom paub tseeb tias cov ntaub ntawv siv tau thiab siv tau ntawm txhua tus nqi. Data Validation thiab Data Verification yog ob qho tseem ceeb ntawm kev ua kom cov ntaub ntawv muaj ob qhov zoo. Cov ntaub ntawv validation ua kom paub tseeb tias cov ntaub ntawv yog huv si, yog thiab lub ntsiab lus, thaum cov ntaub ntawv pov thawj xyuas kom meej tias tag nrho cov luam ntawm cov ntaub ntawv yog zoo li tus thawj. Yog li, ob qho tib si cov txheej txheem no ua kom lub koom haum tsis plam nyiaj vim qhov tsis xav tau ntawm cov ntaub ntawv.
Data validation yog dab tsi?
Data validation deals nrog ua kom cov ntaub ntawv siv tau (huv, raug thiab pab tau). Cov txheej txheem validation cov ntaub ntawv siv cov ntaub ntawv validation cov cai (los yog xyuas cov txheej txheem) los xyuas kom meej lub validity (feem ntau yog qhov tseeb thiab lub ntsiab lus) ntawm cov ntaub ntawv. Nws tseem ua kom muaj kev siv tau ntawm cov ntaub ntawv nkag los tswj kev ruaj ntseg ntawm lub system. Cov kev cai no tau txais los ntawm cov ntaub ntawv dictionaries. Kev lees paub cov ntaub ntawv tseem tuaj yeem siv los ntawm kev tshaj tawm cov ntaub ntawv ncaj ncees cov cai lossis cov txheej txheem tswj hwm kev lag luam (tshwj xeeb tshaj yog hauv cov ntawv thov kev lag luam). Cov kev cai ua lag luam no feem ntau raug ntes thaum thawj zaug kev lag luam xav tau kev tshuaj xyuas los ntawm cov kws tshuaj ntsuam kev lag luam. Nws yog ib qho tseem ceeb heev rau kev siv cov kev cai lag luam thaum pib ntawm tus txheej txheem, vim hais tias cov ntaub ntawv tsis raug cai feem ntau muaj kev cuam tshuam tsis zoo rau kev ua tiav ntawm cov txheej txheem kev lag luam.
Daim ntawv yooj yim tshaj plaws ntawm kev siv tau yog kuaj xyuas cov tswv yim kom paub tseeb tias lawv tau tsim los ntawm cov cim los ntawm "tsim" siv tau. Piv txwv li, cov txheej txheem validation rau daim ntawv teev npe xov tooj yuav tsum validate tus xov tooj input kom paub tseeb tias lawv tsuas muaj cov zauv, ntxiv/minus cim thiab brackets (thiab tsis muaj dab tsi ntxiv). Cov txheej txheem kev lees paub me ntsis ntxiv tuaj yeem tshawb xyuas lub teb chaws code teb los xyuas seb lawv puas yog cov cai hauv lub tebchaws.
Cov ntaub ntawv pov thawj yog dab tsi?
Kev txheeb xyuas cov ntaub ntawv yog txheej txheem ntawm kev tshuaj xyuas cov ntawv luam kom paub tseeb tias nws yog sib npaug ntawm cov ntaub ntawv qub. Cov ntaub ntawv pov thawj feem ntau yuav tsum tau thaum koj tau thaub qab koj cov ntaub ntawv. Feem ntau niaj hnub thaub qab software muaj nyob rau hauv-ua pov thawj functionality. Txawm li cas los xij, disc hlawv software tso cai rau koj los ua pov thawj thaum kawg ntawm cov txheej txheem hlawv. Yog hais tias cov ntaub ntawv ntawm cov hlawv disc raug txheeb xyuas ces koj zoo. Tab sis yog tias tsis yog, koj yuav tsum muab pov tseg qhov disc thiab hlawv dua. Kev txheeb xyuas cov ntaub ntawv yog txheej txheem tseem ceeb heev vim nws ua rau koj muaj kev nyab xeeb vim tias koj yuav ntseeg tau tias koj tuaj yeem siv cov ntaub ntawv thaub qab tiag tiag yog tias cov ntaub ntawv qub ploj lossis puas. Kev pov thawj software feem ntau ua kom cov ntawv luam tuaj yeem nyeem tau zoo li cov ntsiab lus sib phim raws nraim nrog cov ntsiab lus qub. Yog li, nws yuav siv sij hawm ntau tshaj li qhov yooj yim thaub qab, tab sis nws yog qhov tsim nyog rau qhov teeb meem. Tab sis feem ntau cov tuam txhab loj ua cov thaub qab tsis siv neeg thaum hmo ntuj, yog li kev ncua sij hawm ntev vim cov txheej txheem pov thawj tsis yog teeb meem loj.
Dab tsi yog qhov sib txawv ntawm Cov Ntawv Pov Thawj thiab Cov Ntaub Ntawv Pov Thawj?
Data validation feem ntau yog ua nyob rau hauv thawj daim ntawv los yog cov inputs rau lub system, thaum cov ntaub ntawv pov thawj yog nqa tawm nyob rau hauv cov ntawv luam (los yog backups) cov ntaub ntawv. Kev tshuaj xyuas qhov siv tau ntawm cov khoom siv tau nrawm heev piv rau cov txheej txheem pov thawj ntev uas tshwm sim tom qab thaub qab. Kev siv tau siv tau los tiv thaiv cov ntaub ntawv los ntawm kev ua yuam kev los ntawm cov neeg siv, thaum kev pov thawj tuaj yeem siv los tiv thaiv cov ntaub ntawv los ntawm cov teeb meem uas tshwm sim vim qhov ua tsis raug.
