Video: Dab tsi yog batch ua hauv SQL?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Batch processing tso cai rau koj mus rau pab pawg muaj feem xyuam SQL ntawv nqe lus rau hauv a pawg thiab xa lawv nrog ib tug hu mus rau lub database. Thaum koj xa ob peb SQL ntawv cov nqe lus rau cov ntaub ntawv ib zaug, koj txo qhov kev sib txuas lus nyiaj siv ua haujlwm, yog li txhim kho kev ua haujlwm.
Ib yam li ntawd, dab tsi yog batch hauv SQL?
A pawg yog ib pab pawg ntawm ib los sis ntau dua Transact- SQL ntawv nqe lus xa tuaj rau tib lub sijhawm los ntawm daim ntawv thov mus rau SQL ntawv Server rau kev ua haujlwm. SQL ntawv Server compile cov nqe lus ntawm a pawg mus rau hauv ib lub executable unit, hu ua execution plan. Cov nqe lus hauv txoj kev npaj ua tiav yog tom qab ntawd ua tiav ib zaug.
Tsis tas li ntawd, kuv yuav cais cov nqe lus SQL li cas? Qee lub tshuab database xav tau ib lub cim ntawm qhov kawg ntawm txhua qhov SQL lus . Semicolon yog tus txheej txheem rau cais txhua SQL lus nyob rau hauv database systems uas tso cai ntau tshaj ib SQL lus yuav tsum tau ua nyob rau hauv tib hu mus rau lub server. Hauv qhov kev qhia no, peb yuav siv semicolon kawg ntawm txhua qhov SQL lus.
Ib tug kuj yuav nug, dab tsi yog batch ntxig rau hauv SQL?
Raws li Wikipedia, "A Ntim ntim yog cov txheej txheem lossis cov txheej txheem muab los ntawm kev tswj hwm cov ntaub ntawv kom thauj khoom ntau kab ntawm cov ntaub ntawv mus rau hauv lub rooj database. " Yog hais tias peb kho qhov kev piav qhia no raws li cov BULK INSERT nqe lus, bulk insert tso cai import cov ntaub ntawv sab nraud rau hauv SQL ntawv Server.
Dab tsi yog batch hloov tshiab hauv SQL?
Ib JDBC batch hloov tshiab yog a pawg ntawm tshiab ua ke ua ke, thiab xa mus rau cov ntaub ntawv hauv ib qho pawg , es tsis xa cov tshiab ib ntawm ib. Koj ua tau pawg ob leeg SQL ntawv inserts, tshiab thiab deletes. Nws tsis tsim nyog rau pawg xaiv cov nqe lus.
Pom zoo:
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