Video: Koj txhais li cas los ntawm kev tswj cov ntaub ntawv?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov ntaub ntawv tswj yog tus txheej txheem tswj thiab tswj cov ntaub ntawv . Nws yog ib hom kev sab hauv tswj tsim los ua kom tiav cov ntaub ntawv kev tswj hwm thiab cov ntaub ntawv lub hom phiaj tswj. Cov hauv qab no yog cov piv txwv ntawm tswj cov ntaub ntawv.
Ib yam li ntawd, peb txhais li cas los ntawm cov ntaub ntawv?
Cov ntaub ntawv yog cov ntaub ntawv sib txawv, feem ntau formatted hauv ib txoj kev tshwj xeeb. Txij li thaum nruab nrab-1900s, tib neeg tau siv lo lus cov ntaub ntawv rau txhais tau tias cov ntaub ntawv hauv computer uas kis tau lossis khaws cia. Hais lus nruj, cov ntaub ntawv yog lub plural ntawm datum, ib daim ntaub ntawv.
Ib yam li ntawd, cov ntaub ntawv thiab piv txwv ntawm cov ntaub ntawv yog dab tsi? Cov ntaub ntawv txhais tau tias yog qhov tseeb lossis cov duab, lossis cov ntaub ntawv uas khaws cia hauv lossis siv los ntawm lub computer. Ib piv txwv ntawm cov ntaub ntawv yog cov ntaub ntawv sau rau ib daim ntawv tshawb fawb. Ib piv txwv ntawm cov ntaub ntawv yog email.
Raws li, kev tswj cov ntaub ntawv hauv DBMS yog dab tsi?
A tswj cov ntaub ntawv lus (DCL) yog syntax zoo ib yam li computer programming lus siv los tswj nkag mus rau cov ntaub ntawv khaws cia rau hauv ib lub database (Authorization). Tshwj xeeb, nws yog ib feem ntawm Structured Query Language (SQL). Piv txwv ntawm DCL cov lus txib suav nrog: GRANT tso cai rau cov neeg siv tshwj xeeb los ua cov haujlwm tshwj xeeb.
Koj txhais li cas los ntawm cov ntaub ntawv hauv kev txheeb cais?
cov ntaub ntawv yog ib qho ntawm cov ntaub ntawv tseeb raug kaw thiab siv rau lub hom phiaj ntawm kev tshuaj xyuas. Nws yog cov ntaub ntawv nyoos los ntawm qhov twg txheeb cais yog tsim. Statistics yog cov txiaj ntsig ntawm cov ntaub ntawv tsom xam - nws txhais lus thiab kev nthuav qhia. Feem ntau cov hom no txheeb cais yog hu ua ' cov ntaub ntawv txheeb cais '.
Pom zoo:
Tus qauv twg yog siv los hloov cov ntaub ntawv kho mob thiab kev tswj hwm ntawm ntau lub tsev kho mob cov ntaub ntawv xov xwm HIS)?
Kev Noj Qab Haus Huv Qib Xya lossis HL7 yog hais txog cov txheej txheem thoob ntiaj teb rau kev hloov pauv cov ntaub ntawv kho mob thiab kev tswj hwm ntawm cov ntawv thov software siv los ntawm ntau tus kws kho mob. Cov qauv no tsom rau cov txheej txheem thov, uas yog 'txheej 7' hauv OSI qauv
Koj txhais li cas los ntawm kev nthuav qhia tabular ntawm cov ntaub ntawv?
Tabulation i.e. Tabular Presentation of data is a method of presentation of data. Nws yog ib qho systematic thiab logic kev npaj ntawm cov ntaub ntawv nyob rau hauv daim ntawv ntawm kab thiab kab nrog rau cov yam ntxwv ntawm cov ntaub ntawv
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
Yuav ua li cas rau txim nyob rau hauv Is Nrias teb rau nyiag computer cov ntaub ntawv cov cuab tam los yog tej software qhov chaw code los ntawm ib tug neeg lub koom haum los yog los ntawm lwm yam txhais tau tias?
Kev piav qhia: Kev rau txim hauv Is Nrias teb rau kev nyiag cov ntaub ntawv hauv computer, cov khoom muaj nqis lossis ib qho software cov cai los ntawm ib lub koom haum, ib tus neeg, lossis los ntawm lwm txoj kev yog raug kaw 3 xyoo thiab raug nplua ntawm Rs. 500,000
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