Cov txheej txheem:
Video: Dab tsi yog cov ntsiab lus ntawm cov ntaub ntawv piav qhia txog nws?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Muaj cov khoom siv hluav taws xob hauv lub cev xws li khoos phis tawj, I / O cov cuab yeej, cov khoom siv cia, thiab lwm yam, qhov no muab kev sib txuas ntawm cov khoos phis tawj thiab lub ntiaj teb tiag. DBMS muaj nyob rau sau, khaws, txheej txheem thiab nkag tau cov ntaub ntawv, qhov tseem ceeb tshaj plaws tiv thaiv.
Ib yam li ntawd, koj tuaj yeem nug, plaub yam ntawm cov txheej txheem database yog dab tsi?
Plaub yam ntawm lub database system yog:
- Cov neeg siv.
- Database Application.
- Database Management System (DBMS)
- Database.
Tsis tas li ntawd, qhov twg feature yog ib feem ntawm daim ntawv thov database? Cov yam ntxwv ntawm daim ntawv thov database yog Cov Neeg Siv, Cov Ntaub Ntawv, Kho vajtse, thiab Software.
Ua raws li qhov xav tau, DBMS yog dab tsi thiab nws cov khoom?
Cheebtsam ntawm DBMS . Cov kev tswj hwm database tuaj yeem muab faib ua tsib qhov loj cov khoom , lawv yog: Hardware. Software. Database Access Language.
Dab tsi yog qhov database?
A database yog cov ntaub ntawv qauv uas khaws cov ntaub ntawv tsim nyog. Feem ntau databases muaj ntau lub rooj, uas txhua tus tuaj yeem suav nrog ntau qhov sib txawv. Piv txwv li, ib lub tuam txhab database tej zaum yuav suav nrog cov rooj rau cov khoom, cov neeg ua haujlwm, thiab cov ntaub ntawv nyiaj txiag.
Pom zoo:
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 ntsiab lus ntawm cov kab lus taw qhia?
Hauv kev sau ntawv, kev taw qhia, uas tuaj yeem yog ib lossis ob kab lus, qhia lub ntsiab lus. Muaj peb ntu rau kev taw qhia: cov lus qhib, cov kab lus txhawb nqa, thiab cov ntsiab lus pib
Cov lus txib dab tsi yuav qhia cov ntsiab lus ntawm Nvram ntawm kev hloov pauv?
Cov lus txib uas yuav tso saib cov ntsiab lus tam sim no ntawm cov tsis-volatile random-access memory (NVRAM) yog: qhia kev pib teeb tsa. Ntawm qhov screen koj yuav pom cov hauv qab no: 'Hloov #show startup-configuration
Lub sij hawm nyob rau hauv ontology yog dab tsi yog hais txog cov lus piav qhia hierarchical thiab cov lus hais txog ib qho tshwj xeeb?
Lub schema yog ib lo lus ontology uas hais txog cov lus piav qhia hierarchical thiab cov lus hais txog ib lub npe. Ib lub npe sawv cev rau tag nrho lub tuam txhab lossis kev faib hauv ib lub tuam txhab. Ib tug cwj pwm yog ib tug yam ntxwv tshwj xeeb hais txog ib chav kawm, uas yog ib hom khoom
Dab tsi yog tus hais lus sau nws lub hom phiaj thiab dab tsi yog yam tseem ceeb uas yuav tsum nco ntsoov txog cov lus hais?
Cov neeg hais lus sau ntawv yog cov ntawv qhia uas tus neeg nthuav qhia siv thaum nthuav qhia qhov kev nthuav qhia. Lawv pab tus neeg nthuav qhia nco txog cov ntsiab lus tseem ceeb thaum muab kev nthuav qhia. Lawv tshwm sim ntawm tus swb thiab tuaj yeem pom tsuas yog los ntawm tus tshaj tawm thiab tsis yog cov neeg tuaj saib