Ib hom lus yog ib hom lus. Sublanguages tshwm sim nyob rau hauv tej yam lus, computer programming lus, thiab relational databases.
Dab tsi yog Sublanguages Vim li cas lawv tseem ceeb?
A cov ntaub ntawv sublanguage yog ib hom lus uas tsuas yog tsim los txhais thiab ua cov ntaub ntawv. … Koj tsis tuaj yeem ua txhua yam nrog cov cuab yeej graphical, nws yog tib txoj hauv kev los tsim SQL programmatically, thiab koj yuav yog tus tsim database muaj zog yog tias koj paub nws.
Dab tsi yog database Sublanguages?
In relational database theory, lo lus "sublanguage", thawj zaug siv rau lub hom phiaj no los ntawm E. F. Codd hauv xyoo 1970, yog hais txog lus siv computer siv los txhais lossis tswj cov qauv thiab cov ntsiab lus ntawm kev sib raug zoodatabase tswj system (RDBMS).
Puas yog SQL cov ntaub ntawv sublanguage?
SQL pib lub neej raws li cov ntaub ntawv sublanguage keeb kwm ntawd yog >20yrs qab peb. (Qhov "cov ntaub ntawv sublanguage" tseem yog feem ntau-siv thiab feem ntau siv tau, tab sis qhov ntawd tsis hloov qhov tseeb hais tias kev hais lus, SQL-tus-lus muaj txhua yam nws yuav siv los suav tias yog ib hom lus programming tag nrho.)
Dab tsi yog hom lus hauv DBMS?
Database lus yog siv los nyeem, hloov kho thiab khaws cov ntaub ntawv hauv database. Muaj ntau hom lus uas siv tau rau lub hom phiaj no; ib tug ntawm lawv yog SQL (Structured Query Language).
