Video: Dab tsi yog Native Dynamic SQL?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Native Dynamic SQL . Dynamic SQL tso cai rau ib daim ntawv thov khiav SQL ntawv cov nqe lus uas nws cov ntsiab lus tsis paub txog thaum lub sijhawm ua haujlwm. Lub ntsiab kom zoo dua ntawm dynamic SQL yog tias nws tso cai rau koj ua DDL cov lus txib uas tsis txhawb nqa ncaj qha hauv PL / SQL ntawv , xws li tsim cov rooj.
Hais txog qhov no, Dynamic SQL piv txwv yog dab tsi?
Dynamic SQL yog SQL ntawv cov lus uas tau tsim los ntawm lub sijhawm ua haujlwm; rau piv txwv , daim ntawv thov tuaj yeem tso cai rau cov neeg siv nkag mus rau lawv tus kheej cov lus nug. Dynamic SQL yog cov txheej txheem programming uas tso cai rau koj los tsim SQL ntawv cov lus dynamically ntawm runtime.
Ib yam li ntawd, SQL dynamic hauv Oracle yog dab tsi nrog piv txwv? Rau piv txwv , dynamic SQL cia koj tsim cov txheej txheem uas ua haujlwm ntawm lub rooj uas nws lub npe tsis paub txog thaum lub sijhawm ua haujlwm. Oracle suav nrog ob txoj hauv kev los siv dynamic SQL hauv PL/ SQL ntawv application: Native dynamic SQL , koj qhov chaw dynamic SQL nqe lus ncaj qha rau PL/ SQL ntawv thaiv.
Tom qab ntawd, dynamic SQL lus nug yog dab tsi?
Dynamic SQL hais txog SQL lus uas yog generated thaum lub sij hawm khiav. Piv txwv li, tus neeg siv yuav nkag mus rau qhov kev tshawb nrhiav parameter, thiab cov nug yuav khiav nrog tus nqi ntawd. Dynamic SQL muaj txiaj ntsig thaum peb tsis paub lub rooj lossis cov khoom uas peb yog nug . Hauv zaj lus qhia no, peb tau hais txog ib qho piv txwv ntawm dynamic SQL hauv SQL ntawv Server.
Cov txheej txheem khaws cia dynamic yog dab tsi?
A dynamic SQL ib a khaws cov txheej txheem yog ib nqe lus Transact-SQL lossis ib pawg nqe lus khaws cia hauv qhov sib txawv thiab ua tiav siv SQL hais kom ua. A Dynamic SQL xav tau thaum peb yuav tsum tau muab cov ntaub ntawv teev tseg raws li kev tshawb nrhiav sib txawv.
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