Cov txheej txheem:
Video: Yuav ua li cas qhib SQL Server database?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Txhawm rau pib Database Engine Tuning Advisor los ntawm SQL Server Management Studio Query Editor
- Qhib qhov Kev Lag Luam- SQL ntawv script file hauv SQL Server Management Studio.
- Xaiv ib qho lus nug hauv Kev Ua Haujlwm- SQL ntawv tsab ntawv, los yog xaiv tag nrho cov ntawv, right-click lub xaiv, thiab xaiv Analyze Query nyob rau hauv Database Cav Tuning Tus kws pab tswv yim.
Ib yam li ntawd, kuv yuav kho cov lus nug SQL hauv SQL Server li cas?
Cov lus qhia yooj yim ntawm tuning SQL Server queries
- Tsis txhob siv cov * hauv koj cov lus nug.
- Txhua kab ntawv koom nrog hauv kev ntsuas yuav tsum tshwm sim ntawm qhov twg thiab koom nrog cov kab lus ntawm tib qhov lawv tshwm sim ntawm qhov ntsuas.
- Zam kev saib.
- Tshawb xyuas yog tias cov lus nug tseem ceeb tau txais txiaj ntsig los ntawm kev xa nws mus rau hauv cov txheej txheem khaws cia.
- Tsis txhob koom nrog ntau dhau ntawm koj cov lus nug: tsuas yog siv qhov tsim nyog!
Qhov thib ob, qhov kev ua tau zoo tuning hauv SQL Server yog dab tsi? SQL Server kev ua tau zoo tuning yog tus txheej txheem los xyuas kom meej tias cov SQL ntawv cov lus tshaj tawm los ntawm daim ntawv thov khiav hauv lub sijhawm ceev tshaj plaws. Hauv lwm lo lus, tuning SQL cov nqe lus yog nrhiav thiab coj txoj kev ceev tshaj plaws los teb koj nug , ib yam li nrhiav txoj hauv kev nrawm tshaj plaws rau koj lub tsev tom qab ua haujlwm.
Kuj kom paub, koj ua li cas qhib lub database?
Sab saum toj 10 kev ua tau zoo tu lub tswv yim rau kev sib txheeb databases
- Scenario.
- Tswv yim 1 - Database statistics.
- Tswv yim 2 - Tsim optimized indexes.
- Tswv yim 3 - Zam kev ua haujlwm ntawm RHS ntawm tus neeg teb xov tooj.
- Tswv yim 4 - Predetermine xav kom loj hlob.
- Tswv yim 5 - Qhia cov lus qhia optimizer hauv SELECT.
- Tswv yim 6 - Siv EXPLAIN.
- Tswv yim 7 - Tsis txhob muaj kev txwv tseem ceeb txawv teb chaws.
Yuav ua li cas peb yuav optimize SQL lus nug?
Ua raws li SQL cov kev coj ua zoo tshaj plaws los xyuas kom meej cov lus nug optimization:
- Index tag nrho cov predicates nyob rau hauv JOIN, qhov twg, ORDER BY thiab GROUP BY clauses.
- Tsis txhob siv cov haujlwm hauv cov lus qhia.
- Tsis txhob siv wildcard (%) thaum pib ntawm qhov ua piv txwv.
- Zam cov kab tsis tsim nyog hauv SELECT clause.
- Siv cov koom nrog sab hauv, tsis yog kev koom nrog sab nraud yog tias ua tau.
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