Video: Cov ntaub ntawv xa mus li cas?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Txoj kev attribute qhia tias yuav ua li cas xa daim ntawv - cov ntaub ntawv (cov daim ntawv - cov ntaub ntawv yog xa mus rau nplooj ntawv teev nyob rau hauv tus cwj pwm ua). Cov daim ntawv - cov ntaub ntawv tuaj yeem yog xa raws li URL variables (nrog method = "get") los yog raws li HTTP post pauv (nrog method="post"). Cov lus ceeb toom ntawm GET: Appends daim ntawv - cov ntaub ntawv rau hauv URL hauv lub npe/tus nqi khub.
Hais txog qhov no, cov ntaub ntawv xa mus li cas?
Nquag, cov daim ntawv cov ntaub ntawv xa mus rau nplooj ntawv web ntawm tus neeg rau zaub mov thaum tus neeg siv nyem rau ntawm xa khawm. Yog tias qhov kev ua yeeb yam raug tshem tawm, qhov kev txiav txim raug teeb tsa rau nplooj ntawv tam sim no.
Ib sab saum toj, cov ntaub ntawv hauv POST yog dab tsi? Qhov < daim ntawv > lub ntsiab txhais li cas cov ntaub ntawv yuav xa. Tag nrho nws cov cwj pwm yog tsim los cia koj configure lub thov xa mus rau thaum tus neeg siv ntaus lub pob xa tawm. Ob yam tseem ceeb tshaj plaws yog kev nqis tes ua thiab txoj kev.
Tom qab ntawd, ib tug kuj yuav nug, yuav ua li cas cov ntaub ntawv xa mus rau hauv txoj kev tshaj tawm?
Hauv kev suav, POST yog a thov txoj kev txhawb los ntawm HTTP siv los ntawm World Wide Web. Los ntawm kev tsim, lub POST thov txoj kev thov kom lub web server txais qhov cov ntaub ntawv nyob rau hauv lub cev ntawm lub thov lus, feem ntau yuav khaws cia. Nws feem ntau siv thaum uploading cov ntaub ntawv lossis thaum xa daim ntawv ua tiav hauv lub vev xaib.
Form data yog dab tsi?
FormData cov khoom siv los ntes HTML daim ntawv thiab xa nws siv fetch lossis lwm txoj hauv kev network. Peb tuaj yeem tsim tshiab FormData ( daim ntawv ) los ntawm HTML daim ntawv , los yog tsim ib yam khoom tsis muaj a daim ntawv tag nrho, thiab tom qab ntawd ntxiv cov teb nrog cov txheej txheem: formData.
Pom zoo:
Vim li cas cov ntaub ntawv tiaj tus tsis zoo dua li cov ntaub ntawv sib raug zoo?
Ib lub rooj ua ntaub ntawv tiaj tus yog qhov tseem ceeb rau kev sau cov ntaub ntawv tsawg. Tab sis cov ntaub ntawv loj loj tuaj yeem ua tsis tau raws li nws siv ntau qhov chaw thiab nco dua li cov ntaub ntawv sib txheeb. Nws kuj yuav tsum tau muab cov ntaub ntawv tshiab ntxiv txhua zaus koj nkag mus rau cov ntaub ntawv tshiab, qhov kev sib raug zoo database tsis
Kuv yuav hloov cov ntaub ntawv tab delimited rau cov ntaub ntawv csv li cas?
Mus rau cov ntawv qhia zaub mov, xaiv 'OpenCSVTab-Delimited File' (lossis tsuas yog nias Ctrl + O), thiab tom qab ntawd los ntawm lub thawv qhib, xaiv cov ntaub ntawv tab-delimited qhib. Koj tuaj yeem luam cov tab-delimited txoj hlua mus rau clipboard thiab tom qab ntawd siv 'Qhib Cov Ntawv Hauv Cov Ntawv Teev Npe' xaiv (Ctrl + F7)
Kuv yuav ua li cas thiaj tsim tau ZIP cov ntaub ntawv nrog ntau cov ntaub ntawv?
Muab ob peb cov ntaub ntawv mus rau hauv ib qho zippedfolder kom yooj yim sib faib ib pawg ntawm cov ntaub ntawv. Nrhiav cov ntaub ntawv lossis nplaub tshev uas koj xav zip. Nias thiab tuav (lossis right-click) cov ntaub ntawv lossis ntawv tais ceev tseg, xaiv (lossis taw tes rau) Xa mus rau, thiab tom qab ntawd xaiv Compressed (zipped) folder
Vim li cas kem taw qhia cov ntaub ntawv khaws cia ua cov ntaub ntawv nkag ntawm disks sai dua li kab qhia cov ntaub ntawv khaws cia?
Kem oriented databases (aka columnar databases) yog qhov tsim nyog rau kev ntsuas kev ua haujlwm ntau dua vim tias cov ntaub ntawv hom ntawv (kem hom) qiv nws tus kheej kom nrawm dua cov lus nug ua - scans, aggregation thiab lwm yam. Ntawm qhov tod tes, kab oriented databases khaws ib kab (thiab tag nrho nws. kab) contiguously
Dab tsi yog cov teeb meem ntawm kev tswj cov ntaub ntawv hauv cov ntaub ntawv ib txwm muaj?
Nyob rau tib lub sijhawm, qhov kev tswj hwm cov ntaub ntawv ib puag ncig tsim teeb meem xws li cov ntaub ntawv rov ua dua thiab tsis sib xws, cov kev pab cuam-cov ntaub ntawv dependence, inflexibility, tsis muaj kev ruaj ntseg, thiab tsis muaj cov ntaub ntawv sib qhia thiab muaj