Yog dml nqe lus autocommit?
Yog dml nqe lus autocommit?

Video: Yog dml nqe lus autocommit?

Video: Yog dml nqe lus autocommit?
Video: Fireboy DML - YAWA (Official Video) 2024, Lub peb hlis ntuj
Anonim

No. Tsuas yog DDL (Data Definition Language) cov lus xws li tsim, hloov, poob, txiav tawm yog pib ua haujlwm.

DML puas xav tau kev cog lus?

DML (Data Manipulation Language) cov lus txib xav tau kom tau cog lus / dov rov qab.

Puas yog DML yog nws pib cog lus?

Kuv rov hais dua tias DML tsis tau cog lus cia hauv Oracle. Txawm li cas los xij, feem ntau cov neeg siv software peb siv los txuas rau cov ntaub ntawv tuaj yeem teeb tsa los teeb tsa kev cog lus tom qab txhua nqe lus.

nqe lus twg ua Autocommit hauv SQL?

Auto-commit hom txhais tau hais tias thaum ib nqe lus tiav, txoj kev cog lus raug hu rau ntawm nqe lus ntawd. Auto-commit in effect ua rau txhua nqe lus SQL ib qho kev sib pauv. Qhov kev cog lus tshwm sim thaum nqe lus ua tiav lossis nqe lus tom ntej raug ua tiav, qhov twg los ua ntej.

Qhov twg yog Autocommit command?

Nyob rau hauv cov ntsiab lus ntawm kev tswj cov ntaub ntawv, autocommit yog a hom kev ua haujlwm ntawm kev sib txuas ntawm cov ntaub ntawv Txhua tus neeg siv cov ntaub ntawv sib cuam tshuam (piv txwv li, txhua nqe lus SQL) xa los ntawm kev sib txuas database hauv autocommit hom yuav raug tua nyob rau hauv nws tus kheej lw uas yog implicitly cog lus.

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