Cov lus tshaj tawm txhais li cas?
Cov lus tshaj tawm txhais li cas?

Video: Cov lus tshaj tawm txhais li cas?

Video: Cov lus tshaj tawm txhais li cas?
Video: Tshuaj theem vim li cas thiaj tau nqi ?/ Siv kho mob dab tsi?/paris polyphylla use for? 2024, Kaum ib hlis
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Cov lus tshaj tawm , kuj hu ua nonprocedural lossis qib siab heev, yog programming yam lus nyob rau hauv uas (zoo tagnrho) ib qhov kev pab cuam qhia yog dab tsi yuav tau ua es yuav ua li cas ua nws. Nyob rau hauv xws li yam lus nyob ntawd yog tsawg qhov sib txawv ntawm qhov specification ntawm ib qho kev pab cuam thiab…

Tom qab ntawd, qhov txawv ntawm cov lus tseem ceeb thiab cov lus tshaj tawm yog dab tsi?

Tshaj tawm programming yog thaum koj hais qhov koj xav tau, thiab yam lus tseem ceeb yog thaum koj hais li cas kom tau qhov koj xav tau. Thawj qhov piv txwv yog tshaj tawm vim peb tsis qhia meej txog "cov ntsiab lus ntawm kev nqis tes ua" ntawm kev tsim cov npe.

Ib tug kuj yuav nug, dab tsi yog tus qauv tshaj tawm? Tshaj tawm programming yog "txoj cai ntawm kev ua haujlwm hauv cov lus uas ua raws li lub hlwb qauv ntawm tus tsim tawm ntau dua li kev ua haujlwm qauv ntawm lub tshuab." Hauv computer science, tshaj tawm programming yog ib qho programming paradigm uas qhia txog cov laj thawj ntawm kev suav tsis tau piav qhia nws cov kev tswj hwm.

Tsis tas li ntawd, SQL yog ib hom lus tshaj tawm?

SQL ntawv (Structured Query Lus ) yog a tshaj tawm nug lus thiab yog tus qauv kev lag luam rau kev sib txheeb databases. Tshaj tawm nug yam lus kuj tseem siv tau yooj yim dua li lawv tsuas yog tsom rau qhov yuav tsum tau rov qab thiab ua sai sai. Txawm li cas los xij, cov lus tshaj tawm muaj lawv tus kheej kev sib pauv.

Kev tshaj tawm kev tshaj tawm siv rau dab tsi?

Tshaj tawm programming tuaj yeem yooj yim sau cov kev pabcuam sib luag. Feem ntau tshaj tawm Cov lus muaj xws li cov lus nug database (piv txwv li, SQL, XQuery), cov lus qhia tsis tu ncua, logic programming , ua haujlwm programming , thiab configuration tswj systems.

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