Video: Dab tsi yog qhov txawv ntawm cov khoom taw qhia cov qauv database thiab cov qauv kev sib raug zoo?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov qhov sib txawv ntawm kev sib txheeb database thiab object oriented database yog tias cov ntaub ntawv sib txheeb lub hauv paus khw cov ntaub ntawv hauv daim ntawv ntawm cov ntxhuav uas muaj kab thiab kab. Hauv cov khoom taw qhia cov ntaub ntawv tus cov ntaub ntawv yog khaws cia nrog rau nws cov kev ua uas ua los yog nyeem cov uas twb muaj lawm cov ntaub ntawv . Cov no yog cov hauv paus sib txawv.
Tom qab ntawd, ib tug kuj yuav nug, qhov txawv ntawm ib yam khoom thiab ib chav kawm nyob rau hauv cov khoom taw qhia cov ntaub ntawv qauv yog dab tsi?
Ib khoom yog ib qho piv txwv ntawm ib qho tshwj xeeb chav kawm . Yam khoom uas qhia cov yam ntxwv zoo sib xws yog pawg hauv chav kawm . A chav kawm yog ib phau ntawv zoo sib xws khoom nrog cov qauv sib koom (tus cwj pwm) thiab tus cwj pwm (txoj kev.)
Tsis tas li ntawd, qhov txawv ntawm DBMS thiab Oodbms yog dab tsi? OODBMS stands rau Object Oriented Database Management System. Hauv OODBMS peb khaws cov ntaub ntawv hauv Object form. DBMS yog ib qho Database Management System. Qhov nrov tshaj plaws DBMS yog kev sib raug zoo database tswj systems uas peb khaws txhua yam raws li kev sib raug zoo nruab nrab cov koom haum.
Hais txog qhov no, dab tsi yog object oriented database qauv?
Ib khoom - taw qhia database kev tswj hwm qhov system (tseem hu ua ib qho khoom database ) yog DBMS qhov twg cov ntaub ntawv tau sawv cev rau hauv daim ntawv ntawm khoom , raws li siv nyob rau hauv khoom - taw qhia programming. Ob leeg siv tib yam qauv ntawm kev sawv cev rau cov ntaub ntawv.
Dab tsi yog qhov zoo sib xws thiab qhov sib txawv ntawm ib chav kawm thiab cov qauv?
Hauv paus, a chav kawm muab cov teb thiab cov hau kev (cov tswv cuab muaj nuj nqi uas txhais cov kev ua) rau hauv ib chav. A qauv yog ib tug sau los ntawm variables ntawm ntau hom ntaub ntawv nyob rau hauv ib chav tsev. Nws yuav luag zoo ib yam li a chav kawm vim tias ob qho tib si yog cov neeg siv cov ntaub ntawv teev tseg thiab ob qho tib si tuav ib pawg ntawm cov ntaub ntawv sib txawv.
Pom zoo:
Puas txhais tau tias yog kev sib raug zoo ntawm cov khoom ntawm ib yam khoom thiab lub peev xwm ntawm tus neeg sawv cev uas muab cov lus qhia rau kev siv cov khoom?
Kev them nyiaj yog kev sib raug zoo ntawm cov khoom ntawm ib yam khoom thiab lub peev xwm ntawm tus neeg sawv cev uas txiav txim siab seb qhov khoom siv tau li cas
Dab tsi yog qhov sib txawv ntawm kev sib txuas lus taw qhia thiab kev sib txuas tsis raug cai?
Qhov txawv: Kev sib txuas lus taw qhia thiab kev sib txuas tsis muaj kev sib txuas Kev sib txuas lus taw qhia kev sib txuas ua rau muaj kev sib txuas thiab xyuas seb cov lus puas tau txais lossis tsis tau thiab xa rov qab yog tias muaj qhov yuam kev tshwm sim, thaum qhov kev pabcuam tsis sib txuas tsis tau lees tias xa xov
Dab tsi yog qhov txawv ntawm kev sib raug zoo unary kev sib raug zoo binary thiab kev sib raug zoo ternary?
Kev sib raug zoo tsis sib xws yog thaum ob tus neeg koom hauv kev sib raug zoo yog tib lub koom haum. Piv txwv li: Cov ncauj lus yuav yog qhov yuav tsum tau ua ua ntej rau lwm yam kev kawm. Kev sib raug zoo ternary yog thaum peb lub koom haum koom nrog kev sib raug zoo
Dab tsi yog qhov txawv ntawm kev sib raug zoo thiab tsis muaj kev sib raug zoo databases?
Qhov sib txawv loj ntawm lawv yog li cas lawv tuav cov ntaub ntawv. Relational databases are structured.Non-relational databases are document-oriented. Qhov no hu ua cov ntaub ntawv hom cia tso cai ntau 'qeb' ntawm cov ntaub ntawv khaws cia hauv ib qho kev tsim lossis Cov Ntaub Ntawv
Dab tsi yog qhov sib txawv tseem ceeb ntawm kev sib txuas lus tsis sib xws thiab kev sib txuas lus taw qhia?
1. Hauv kev sib txuas lus tsis muaj kev sib txuas lus tsis tas yuav tsim kev sib txuas ntawm qhov chaw (sender) thiab qhov chaw (receiver). Tab sis nyob rau hauv kev sib txuas-taw qhia kev sib txuas lus kev sib txuas lus yuav tsum tau tsim ua ntej hloov cov ntaub ntawv