Qhov Tseem Ceeb Qhov txawv - SQL vs MySQL
A database is a collection of data. Muaj ntau hom databases. Relational databases yog hom database los khaws cov ntaub ntawv hauv daim ntawv. Cov rooj no muaj feem cuam tshuam rau ib leeg vim lawv siv cov kev txwv. MySQL yog Relational database tswj system. Cov lus uas siv los ua haujlwm ntawm lub database yog hu ua SQL. Qhov sib txawv tseem ceeb ntawm SQL thiab MySQL yog tias SQL yog ib hom lus los tswj cov ntaub ntawv hauv kev sib raug zoo database thiab MySQL yog qhov qhib qhov Relational Database tswj kev tswj hwm databases siv SQL.
SQL yog dab tsi?
Cov ntaub ntawv muaj txiaj ntsig rau lub koom haum ua nws txoj haujlwm tau zoo thiab ua tau zoo. Yog li, nws yuav tsum tau khaws cov ntaub ntawv kom raug. Lub database yog siv los khaws cov ntaub ntawv. Muaj ntau hom databases. Ib qho kev sib raug zoo database yog ib qho ntawm lawv. Relational databases muaj cov ntxhuav thiab cov ntaub ntawv khaws cia rau hauv cov ntxhuav no. Cov ntxhuav muaj cov kab thiab kab. Ib kab yog cov ntaub ntawv, thiab ib kem yog ib daim teb. Txhua cov ntaub ntawv muaj cov ntaub ntawv tshwj xeeb.
Ib qho kev sib txheeb database tuaj yeem muaj ntau lub rooj. Cov rooj no txuas nrog siv cov yuam sij tseem ceeb thiab cov yuam sij txawv teb chaws. Structured query language yog cov lus nug uas siv los khaws, tswj, khaws cov ntaub ntawv hauv cov ntaub ntawv sib txheeb. SQL tau tsim los siv kev sib txheeb algebra.
SQL tuaj yeem muab faib ua peb pawg. Lawv yog Cov Lus Txhais Lus (DDL), Cov Ntaub Ntawv Tswj Lus (DCL) thiab Cov Ntaub Ntawv Siv Lus (DML). Cov lus txib xws li tsim, hloov pauv, qhov poob tuaj yeem raug cais raws li DDL. Cov lus txib zoo li ntxig, hloov tshiab, tshem tawm tuaj yeem raug cais raws li DML. Grant, tshem tawm yog rau DCL.
MySQL yog dab tsi?
MySQL yog ib qho qhib qhov kev sib raug zoo Database Management System. Ib qho kev pab cuam, uas txhais, tsim thiab tswj cov database yog hu ua Database Management System. Tus programmer tuaj yeem siv SQL queries ntawm MySQL rau cov ntaub ntawv khaws cia thiab khaws cia. Nws muab kev tswj hwm cov ntaub ntawv, kev hloov pauv cov ntaub ntawv, thiab kev tiv thaiv cov ntaub ntawv.
Daim duab 01: MySQL
MySQL yog qhov nrawm thiab siv tau yooj yim. Nws yog nrov database tswj system rau back-end kev loj hlob. Nws yog feem ntau siv nrog PHP rau kev txhim kho lub vev xaib. Ntau hom lus siv cov tsev qiv ntawv txuas rau MySQL. Piv txwv li, Java siv JDBC tsav tsheb los txuas rau daim ntawv thov rau MySQL. Nws kuj ua haujlwm ntawm ntau lub platform xws li Linux, Windows, Mac. MySQL tus thov kev pab yog tus neeg siv khoom txuas mus rau lub server. MySQL-lub rooj ntev zaum muab cov cuab yeej ntsuas kev ua haujlwm rau lub server.
Dab tsi yog qhov zoo sib xws ntawm SQL thiab MySQL?
- Ob leeg muaj feem cuam tshuam nrog kev sib raug zoo database.
- Ob leeg piav qhia hom ntaub ntawv.
- Ob leeg tuaj yeem siv qhov ntsuas ntsuas, cov txheej txheem khaws cia, saib.
- SQL yog lub hauv paus lus rau MySQL.
- Ob leeg siv tau los ua lej lej (+, -,, /, %)
- tuaj yeem ua haujlwm sib piv. (>=, <=thiab lwm yam)
- tuaj yeem ua cov haujlwm tsim nyog. (thiab, lossis, tsis yog)
- Muaj cov yuam sij los tsim kev sib raug zoo ntawm cov rooj. (primary key, Foreign key)
- Muaj peev xwm siv lub npe.
- tuaj yeem koom nrog rooj. (sib koom sab hauv, sab nraud koom, sab laug koom, sab xis koom)
- Siv cov haujlwm sib sau ua ke (min (), max (), suav (), suav (), avg ())
Qhov txawv ntawm SQL thiab MySQL yog dab tsi?
SQL vs MySQL |
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| SQL yog cov lus nug uas tsim los tswj kev sib raug zoo databases. | MySQL yog Relational Database Management System los khaws, khaws, hloov kho thiab tswj hwm cov ntaub ntawv siv SQL. |
| hom lus | |
| SQL yog ib hom lus database. | MySQL yog software. |
| Design Databases | |
| SQL yog lus nug. | MySQL muab cov cuab yeej ua ke ib puag ncig 'MySQL workbench' los tsim thiab qauv databases. |
| txuas | |
| SQL tsis muab cov khoom txuas. | MySQL muab cov ntaub ntawv tsav tsheb rau. NET platform, C ++, Python, Java los tsim cov ntawv thov database. |
Summary – SQL vs MySQL
Cov ntaub ntawv yog siv los khaws cov ntaub ntawv muaj feem cuam tshuam. Muaj ntau hom databases. Databases uas khaws cov ntawv thiab cov lej yog cov ntaub ntawv ib txwm muaj. Databases uas tuaj yeem khaws cov duab yog hu ua Multimedia databases. Qee lub koom haum siv Geographical Information Systems khaws cia cov duab thaj chaw. Ib hom databases feem ntau yog relational databases. Kab lus no tau tham txog qhov sib txawv ntawm SQL thiab MySQL. Qhov txawv ntawm SQL thiab MySQL yog tias SQL yog cov lus nug los tswj cov ntaub ntawv hauv cov ntaub ntawv sib raug zoo thiab MySQL yog qhov qhib qhov Relational Database tswj kev tswj hwm databases siv SQL.
Download PDF Version ntawm SQL vs MySQL
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline lub hom phiaj raws li daim ntawv ceeb toom. Thov download PDF version ntawm no Qhov txawv Ntawm SQL thiab MySQL
