Video: Dab tsi ua rau thaiv hauv SQL Server?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Ntawm SQL Server , thaiv tshwm sim thaum ib tus SPID tuav lub xauv ntawm ib qho chaw tshwj xeeb thiab qhov thib ob SPID sim kom tau txais qhov tsis sib haum xeeb xauv hom ntawm tib qhov chaw. Feem ntau, lub sijhawm ua haujlwm uas thawj SPID xauv cov peev txheej tsawg heev.
Raws li, yuav ua li cas rho tawm thaiv hauv SQL Server?
Tua ib Thaiv Txheej txheem tua a thaiv txheej txheem siv txoj kev no, qhib SQL Server Management Studio thiab txuas rau koj SQL Server piv txwv. Tom qab koj tau txuas nrog, txoj nyem rau ntawm lub npe piv txwv thiab xaiv 'Kev Ua Haujlwm Saib Xyuas' los ntawm cov ntawv qhia zaub mov. Thaum Kev Ua Haujlwm Saib Xyuas tau thauj khoom, nthuav cov ntu 'Cov Txheej Txheem'.
Tsis tas li ntawd, dab tsi yog thaiv thiab koj yuav daws nws li cas? Thaiv tshwm sim thaum ob lossis ntau kab yog xauv los ntawm ib qho kev sib txuas SQL thiab qhov thib ob txuas rau SQL neeg rau zaub mov yuav tsum muaj kev tsis sib haum xeeb ntawm kev xauv ntawm cov kab ntawd. Qhov no ua rau qhov kev sib txuas thib ob tos kom txog thaum lub xauv thawj zaug tso tawm.
Ntxiv mus, yog dab tsi yog xauv thiab thaiv hauv SQL Server?
Xauv yog lub mechanism uas SQL Server siv los tiv thaiv cov ntaub ntawv kev ncaj ncees thaum lub sijhawm ua lag luam. Thaiv . Thaiv (los yog thaiv lub xauv ) tshwm sim thaum ob txheej txheem xav tau kev nkag mus rau tib daim ntaub ntawv ib txhij yog li ib txheej txheem xauv cov ntaub ntawv thiab lwm tus yuav tsum tau tos rau lwm tus kom tiav thiab tso tawm cov xauv.
Cov lus xaiv puas tuaj yeem ua rau thaiv?
SELECT tuaj yeem thaiv tshiab. Tus qauv tsim cov ntaub ntawv zoo thiab lus nug yuav nkaus xwb ua rau tsawg kawg thaiv thiab tsis yog qhov teeb meem. Qhov 'ib txwm' Nrog NOLOCK hint yog yuav luag txhua lub teb tsis yog. Cov lus teb kom raug yog kho koj nug yog li nws tsis luam cov rooj loj loj.
Pom zoo:
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