Video: Koj txhais li cas los ntawm cov ntaub ntawv qauv?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
A cov ntaub ntawv qauv hais txog kev sib raug zoo ntawm kev sib raug zoo thiab cov ntaub ntawv ntws ntawm txawv cov ntaub ntawv cov ntsiab lus koom nrog hauv ntiaj teb cov ntaub ntawv. Nws kuj sau txoj kev cov ntaub ntawv yog khaws cia thiab khaws cia. Cov qauv ntaub ntawv pab sawv cev dab tsi cov ntaub ntawv yuav tsum tau thiab hom twg yog siv rau cov txheej txheem kev lag luam sib txawv.
Hauv qhov no, cov ntaub ntawv Modeling txhais li cas?
Cov ntaub ntawv modeling yog ib tug sawv cev ntawm cov cov ntaub ntawv cov qauv hauv ib lub rooj rau lub tuam txhab database thiab yog ib qho kev qhia muaj zog heev ntawm lub tuam txhab kev lag luam yuav tsum tau ua. Qhov no cov ntaub ntawv qauv yog cov lus qhia siv los ntawm kev ua haujlwm thiab cov kws tshuaj ntsuam xyuas hauv kev tsim thiab kev siv ntawm a database.
Ib yam li ntawd, cov ntaub ntawv qauv hauv DBMS yog dab tsi? Cov ntaub ntawv qauv txhais tau li cas lub logical qauv ntawm a database ua qauv. Cov ntaub ntawv Cov qauv yog qhov tseem ceeb los qhia txog abstraction hauv a DBMS . Cov ntaub ntawv qauv txhais li cas cov ntaub ntawv yog kev cob cog rua rau ib leeg thiab yuav ua li cas lawv tau ua thiab khaws cia rau hauv lub system.
Kuj kom paub yog, cov ntaub ntawv qauv nrog piv txwv yog dab tsi?
Cov ntaub ntawv cov qauv yog tsim los ntawm cov chaw, uas yog cov khoom lossis cov ntsiab lus peb xav taug qab cov ntaub ntawv txog, thiab lawv dhau los ua cov ntxhuav hauv cov ntaub ntawv. Cov khoom, cov neeg muag khoom, thiab cov neeg siv khoom yog txhua yam piv txwv ntawm cov chaw muaj peev xwm hauv a cov ntaub ntawv qauv.
Cov ntaub ntawv qauv yog dab tsi thiab vim li cas nws tseem ceeb?
Ib qho ntawm feem ntau tseem ceeb yam ntawm tej yam loj cov ntaub ntawv qhov project yog cov ntaub ntawv qauv . Cov ntaub ntawv qauv tsim cov qauv koj cov ntaub ntawv yuav nyob hauv cov ntaub ntawv tuaj yeem thiab yuav siv tau thiab thaum kawg dab tsi cov ntaub ntawv yuav qhia.
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 qhov sib txawv ntawm cov qauv siv nyob rau hauv cov ntaub ntawv ntawm cov khoom oriented qauv?
Cov qauv tseem ceeb ntawm cov qauv uas siv rau hauv cov khoom siv yog: Siv cov qauv qauv, Cov qauv qauv (zoo li qub) cov qauv, Cov qauv coj tus cwj pwm (dynamic) khoom qauv