Video: Dab tsi yog qhov tseem ceeb hauv Teradata?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
A TSEEM CEEB Kev txwv yog qhov tshwj xeeb thib ob qhov ntsuas lossis UPI rau cov rooj tsis yog lub sijhawm thiab ib lub rooj sib koom ua ke rau feem ntau ntawm lub cev. Yog xav paub ntxiv thiab piv txwv ntawm TSEEM CEEB Kev txwv ntawm cov rooj sab nraud, saib Temporal Table Support, B035-1182. Koj tsis tuaj yeem suav nrog kab ke nrog JSON cov ntaub ntawv hauv a TSEEM CEEB.
Tom qab ntawd, Teradata puas muaj qhov tseem ceeb?
Teradata Database siv ib qho tshwj xeeb thawj los yog theem nrab index los tswj a thawj tus yuam sij ; yog li ntawd, cov thawj tus yuam sij tuaj yeem cuam tshuam li cas Teradata Database faib thiab retrieves kab. Txawm tias cov thawj tus yuam sij feem ntau yog siv raws li tus thawj index rau ib lub rooj, tej zaum nws yuav los yog tej zaum yuav tsis yog qhov zoo tshaj plaws kem teem rau xaiv raws li ib tug thawj qhov ntsuas.
Tsis tas li ntawd, qhov txawv ntawm qhov tseem ceeb thiab qhov tseem ceeb yog dab tsi? Lub Ntsiab Tseem Ceeb : uas yog siv rau tshwj xeeb txheeb xyuas kab perticular ntawm lub rooj database. Thawj INDEX : Uas yog siv rau tau ib qhov ntsuas los ntawm lub rooj database thiab qhov ntawd indexing yog ua los ntawm tshwj xeeb raws li.
Yog li ntawd, dab tsi yog qhov kev siv thawj qhov ntsuas hauv Teradata?
Thawj qhov ntsuas yog siv txhawm rau txheeb xyuas qhov twg cov ntaub ntawv nyob hauv Teradata . Nws yog siv txhawm rau txheeb xyuas qhov twg AMP tau txais cov ntaub ntawv kab. Txhua lub rooj hauv Teradata yuav tsum muaj ib thawj index txhais. Yog tias thawj index tsis tau txhais, Teradata assigns cov thawj index.
PE hauv Teradata yog dab tsi?
PE , acronym rau "Parsing Engine," yog hom vproc (Virtual Processor) rau kev tswj hwm kev sib tham, ua haujlwm xa tawm thiab SQL parsing hauv ntau txoj haujlwm thiab muaj peev xwm ua haujlwm ib puag ncig ntawm cov Teradata Database. Vproc yog cov txheej txheem software khiav hauv ib puag ncig SMP (Symmetric Multiprocessing) lossis ib lub ntawm.
Pom zoo:
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Cov neeg hais lus sau ntawv yog cov ntawv qhia uas tus neeg nthuav qhia siv thaum nthuav qhia qhov kev nthuav qhia. Lawv pab tus neeg nthuav qhia nco txog cov ntsiab lus tseem ceeb thaum muab kev nthuav qhia. Lawv tshwm sim ntawm tus swb thiab tuaj yeem pom tsuas yog los ntawm tus tshaj tawm thiab tsis yog cov neeg tuaj saib