Video: Puas yog SQL yog tus qauv tsim?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
SQL ntawv yog ib hom lus database nrov tshaj plaws ua ntej txheem xyoo 1986 los ntawm American National Cov qauv Lub koom haum (ANSI). Txij thaum ntawd los, nws yog raug cai tau txais los ua International Txuj los ntawm International Organization for Standardization (ISO) thiab International Electrotechnical Commission (IEC).
Tom qab ntawd, ib tug kuj yuav nug, dab tsi yog tus qauv SQL?
SQL ntawv yog siv los sib txuas lus nrog lub database. Raws li ANSI (American National Cov qauv Institute), nws yog txheem lus rau kev sib raug zoo database tswj systems. SQL ntawv Cov nqe lus yog siv los ua cov haujlwm xws li hloov kho cov ntaub ntawv ntawm cov ntaub ntawv, lossis khaws cov ntaub ntawv los ntawm cov ntaub ntawv.
Ib yam li ntawd, SQL tus qauv tshiab yog dab tsi? SQL: 2016 or ISO/IEC 9075: 2016 (nyob rau hauv lub npe dav dav "Information technology - Database languages - SQL") yog qhov kev hloov kho thib yim ntawm ISO (1987) thiab ANSI (1986) tus qauv rau SQL database query language. Nws tau raug lees paub thaum lub Kaum Ob Hlis 2016.
Kuj nug, yog SQL yog DBMS?
DBMS txhais tau hais tias Database Management System, uas yog ib lub tswv yim thiab cov txheej txheem uas tag nrho los yog loj Database Systems ua raws. DBMS cov khoom zoo li SQL ntawv Server, Oracle, MySQL, IBM DB2, thiab lwm yam siv SQL ntawv raws li tus qauv lus. SQL ntawv lus siv nyob rau hauv cov cuab yeej no muaj ntau heev thiab muaj xws li syntaxes.
SQL sau rau hauv dab tsi?
Qhov chaw qhib SQL ntawv databases (MySQL, MariaDB, PostGreSQL, thiab lwm yam) yog sau rau hauv C. Kev tsim (thiab sim) ib puag ncig yog sau nrog autotools (Posix plhaub, Awk, Makefile) thiab lawv SQL ntawv yam lus.
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