Database - ib tug ntaub ntawv los xyuas system

Cov no yog cov tag nrho cov nyob ib ncig ntawm peb. Lawv tuaj los ntawm cov xov xwm, tos peb nyob rau hauv lub chaw ua hauj lwm, nyob rau pej xeem thauj, txawm nyob rau hauv lub chav ua noj. Txij li thaum txhua txhua niaj hnub tus txiv neej yog lossi muag nrog ib tug lossis loj npaum li ntaub ntawv uas nws muaj mus nqa nrog nws ib tug ntau yam ntawm kev ua: mus noog thiab khw, mus xaiv tus feem ntau tsim nyog yam, tsi, thiab npaj nyob rau hauv lwm txoj kev, rho tawm. Yuav kom automate txoj kev, thiab database tau tsim. By xav tias yuav tus taw tes ntawm view ntawm database - ib tug system mus npaj cov ntaub ntawv.

Yuav ua li cas yog ib tug database

Lub database yog pom tias yuav ua tau ib tug kom array ntawm cov ntaub ntawv. Ib qho piv txwv ntawm xws li ib tug txheeb database tsev qiv ntawv muaj peev xwm ua hauj lwm. Nyob rau hauv nws phau ntawv yog feem ntau yog nyob rau hauv ib tug txog kev txiav txim los ntawm lub npe, los ntawm sau los yog nyob ntawm seb cov kev kawm. Feeb, cov ntaub ntawv kev nthuav qhia kom yooj yim, siv lub rooj ntawv no. Lub hlwb yog muab tso rau nws tus xov tooj, ntawv nyeem, dluab thiab lwm yam hais. Ib tug kab thiab kab muaj ib co cim, uas tshwm sim ordering. Ib tug heev ib qho tseem ceeb qhov teeb meem rau cov kev siv ntawm cov database yog mus nrhiav tau tawm ib tug txheej ntawm cov nta uas cov kev ua ib yam kev kawm cheeb tsam. Uas yog, nyob ntawm seb qhov tseem ceeb ntawm tej cwj pwm no yog sib cais los ntawm lub sij hawm ntawm txhua kev chaw.

Yuav ua li cas yog ib tug DBMS

Database - ib tug tej yam database system. Lub fact tias cov ntaub ntawv yog tsis txaus cia li mus rau lawv koj yuav tsum rau siab ntso ua ib co ntawm cov ua hauj lwm. Ua ntej ntawm tag nrho cov, cov muaj ntaub ntawv kom yuav tsum tau khaws cia. Thiab nyob rau hauv lub neej yav tom ntej koj yuav tau ua li cas rau cov ntaub ntawv yuav tsum tau sai, uas yuav tsum tau tus neeg siv ntawm ib tug muab lub sij hawm ntawd nyob rau hauv qhov tam sim no qhov teeb meem. Yuav kom qhov no kawg, lub tswj system yuav tsum muaj ib yam txheej ntawm algorithms rau sorting, raws li zoo raws li lub peev xwm mus thov ib tug ntau yam ntawm cov ntxaij lim dej. Cov ntaub ntawv yog ces tsim nyog mus ntxiv, rho tawm, kho kom raug, thiab hais txog. Rau qhov yooj yim ntawm kev khiav hauj lwm ib tug ntau yam ntawm cov ntaub ntawv, nws yog tsim nyog hais tias xws li ib tug system yuav kuj cia cov neeg siv kom tsim ib qho lus nug nyob rau hauv ib tug array, "muaj peev xwm" mus ua kom tiav cov kev thov sai sai thiab stably. Nrog kom siv ntawm no database muab tag nrho thiab enables ruaj ntseg cov ntaub ntawv los ntawm txwv tsis pub siv thiab lwm yam implements yuav tsum tau kev tso cai.

Yog vim li cas Mysql database

Mysql - ib tug system tswj paub database. Paub hu xws puag nyob rau hauv cov ntaub ntawv uas yog sawv cev nyob rau hauv daim ntawv ntawm cais ntxhuav, uas yog interconnected thiab interdependent. Los ntawm lwm yam databases Qhov no yog txawv ib co yooj yim nta, namely:

- multithreading, piv txwv li nyob rau tib lub sij hawm nyob rau hauv no system yuav khiav ntau queries;

- simplicity ntawm kev tsim kho ntawm lub neeg rau zaub mov;

- txhim khu kev qha kev tiv thaiv system muaj ib tug saj zawg zog qauv ntawm passwords thiab txoj cai;

- lub peev xwm los siv cov ntaub ntawv ob leeg tsau thiab nce mus nce los ntev;

- zoo cia system raws li nyob rau hauv lub tsev;

- tau nruj mus txog 16 hauv lub lag luam nyob rau hauv lub rooj.

Tseem muaj lwm yam tseem ceeb sib txawv, xws li lub fact tias nyob rau hauv lub database muaj yog ib tug nqi hluav taws xob los kho rooj.

Mysql, raws li ib tug database, nws yog ib qho yooj yim thiab cov zajlus kom system uas tso cai rau koj mus ua tau txhua tsim nyog ua hauj lwm nyob rau hauv cov ntaub ntawv.