Video: Puas muaj qhov sib txawv ntawm SQL thiab MySQL?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
KEV SIJ HAWM :
SQL ntawv yog siv hauv nkag mus, hloov kho, thiab tswj cov ntaub ntawv hauv a database thaum MySQL yog RDBMS uas tso cai rau khaws cia tus cov ntaub ntawv uas muaj hauv a database txheej txheem. SQL ntawv yog Structured Query Language thiab MySQL yog RDBMS los khaws, khaws, kho, thiab tswj cov ntaub ntawv
Kuj nug, qhov txawv ntawm Microsoft SQL thiab MySQL yog dab tsi?
Ob leeg MySQL thiab MS SQL ntawv Server yog dav siv kev lag luam database systems. MySQL yog ib qhov chaw qhib RDBMS, whereas SQL ntawv Server yog a Microsoft khoom. Microsoft tso cai rau cov tuam txhab xaiv los ntawm ob peb tsab ntawm SQL ntawv Server raws li lawv xav tau thiab pob nyiaj siv.
Ib qho tseem yuav nug, qhov kev sib raug zoo ntawm SQL thiab MySQL yog dab tsi? SQL stands rau Structured Query Language. Nws yog cov lus tshaj tawm hauv computer uas yog tsom rau kev nug kev sib raug zoo databases. Nws yog ib hom lus rau kev nkag mus thiab tswj cov databases. Thaum MySQL yog ib qho kev tswj hwm database, zoo li SQL Server, Oracle, Informix, Postgres, thiab lwm yam.
Yog li ntawd, qhov twg zoo dua SQL lossis MySQL?
Hais txog kev ua haujlwm, MySQL muaj zoo dua kev ua tau zoo tshaj MsSQL. Hais txog cov ntaub ntawv rov qab, mssql muaj zoo dua rov qab mechanism piv rau MySQL . Qhov tseem ceeb tshaj plaws yog MySQL ua haujlwm ntawm UNIX thiab Linux thaum mssql tsis ua haujlwm ntawm cov OS no. Nws tsis yog hais txog qhov twg ntawm MySQL los yog MS SQL ntawv Server yog zoo dua.
Dab tsi yog qhov tsis zoo ntawm MySQL?
- MySQL tsis txhawb nqa cov ntaub ntawv loj heev uas muaj txiaj ntsig zoo.
- MySQL tsis txhawb ROLE, COMMIT, thiab Khaws cov txheej txheem hauv cov qauv qis dua 5.0.
- Kev ua lag luam tsis ua haujlwm zoo heev.
- Muaj ob peb yam teeb meem kev ruaj ntseg.
- Nws raug kev txom nyem los ntawm kev ua haujlwm tsis zoo.
Pom zoo:
Dab tsi yog qhov sib txawv ntawm qhov kev txiav tawm thiab qhov kev sib cav Ampliative?
Yog hais tias tus arguer ntseeg hais tias qhov tseeb ntawm qhov chaw yeej tsim qhov tseeb ntawm qhov xaus, ces qhov kev sib cav yog deductive. Yog hais tias tus arguer ntseeg hais tias qhov tseeb ntawm qhov chaw muab tsuas yog vim li cas zoo los ntseeg qhov xaus yog tej zaum muaj tseeb, ces qhov kev sib cav yog inductive
Dab tsi yog qhov sib txawv ntawm qhov sib xyaw ua ke thiab qhov qub txeeg qub teg?
Txawm hais tias ob qho tib si Inheritance thiab Composition muab code reusablelility, qhov sib txawv tseem ceeb ntawm Composition thiab Inheritance nyob rau hauv Java yog tias Composition tso cai rov qab siv code yam tsis tau ncua nws tab sis rau Inheritance koj yuav tsum ncua chav kawm rau ib qho kev rov qab siv code lossis functionality
Puas muaj ntau qhov sib txawv ntawm 8gb thiab 16gb ntawm RAM?
Cov ntaub ntawv ntau dua uas yuav tsum tau thauj mus rau SSD qhov ua haujlwm qeeb qeeb. Nrog 16GB ntawm RAM lub kaw lus tseem tuaj yeem tsim 9290 MIPS qhov twg 8GB teeb tsa tau dhau 3x qeeb. Saib ntawm kilobytes ib ob cov ntaub ntawv peb pom tias 8GBconfiguration yog 11x qeeb dua li 16GBconfiguration
Dab tsi yog qhov sib txawv ntawm lub ntiaj teb thiab hauv zos sib txawv?
Cov kev hloov pauv thoob ntiaj teb tau tshaj tawm sab nraud ib qho haujlwm, thiab lawv tuaj yeem nkag mus (siv) ntawm txhua qhov haujlwm hauv qhov program. Cov kev hloov hauv zos tau tshaj tawm hauv ib txoj haujlwm, thiab tuaj yeem siv tsuas yog hauv qhov haujlwm ntawd. Nws muaj peev xwm muaj qhov sib txawv hauv zos nrog tib lub npe hauv cov haujlwm sib txawv
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