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Video: Koj ua li cas luas sab laug thiab sab xis hauv SQL Server?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
SQL Server tsis txhawb rau Trim () muaj nuj nqi . Tab sis koj tuaj yeem siv tau LTRIM () rau tshem tawm qhov chaw ua ntej thiab RTRIM() rau tshem tawm qhov chaw tom qab . tuaj yeem siv raws li LTRIM (RTRIM(ColumnName)) rau tshem tawm ob leeg. Zoo, nws nyob ntawm seb version ntawm SQL Server koj siv.
Ntawm no, koj ua li cas tshem tawm sab laug thiab sab xis hauv SQL?
Trimming cov Txoj cai los yog Sab laug Sab Tsuas Koj kuj siv tau LTRIM() los txiav chaw dawb los ntawm sab laug sab nkaus xwb, thiab koj tuaj yeem siv RTRIM() los txiav chaw dawb los ntawm txoj cai sab nkaus xwb.
Ib tug kuj yuav nug, Kuv yuav txiav txhua qhov chaw hauv SQL li cas? Cov TRIM () ua haujlwm tshem tawm tus qhov chaw tus cwj pwm LOSSIS lwm cov cim tshwj xeeb los ntawm qhov pib lossis xaus ntawm txoj hlua. Los ntawm default, lub TRIM () ua haujlwm tshem tawm coj thiab taug qab qhov chaw los ntawm ib txoj hlua. Nco tseg: Kuj saib LTRIM() thiab RTRIM() ua haujlwm.
Koj ua li cas luas qhov chaw hauv SQL Server?
Yog tias koj xav tshem tawm cov dawb qhov chaw Thaum pib thiab xaus ntawm txoj hlua ces koj tuaj yeem siv ob qho tib si LTRIM thiab RTRIM rau txoj hlua. Xwb yog tias koj siv MySQL lossis Microsoft Access ces koj tuaj yeem siv qhov TRIM muaj nuj nqi uas ua tib yam li thov ob qho tib si LTRIM thiab RTRIM.
Yuav ua li cas koj trim hauv SQL?
Lub syntax rau TRIM muaj nuj nqi yog raws li nram no:
- TRIM([LOCATION] [remstr] FROM] str) [LOCATION] tuaj yeem yog LEADING, TRAILING, lossis ob qho tib si.
- LTRIM (str)
- RTRIM (str)
- SELECT TRIM('Sample');
- 'Sample'
- SELECT LTRIM('Sample');
- 'Sample'
- SELECT RTRIM('Sample');
Pom zoo:
Lub tsev Roman tseem ceeb thiab zoo li cas suav nrog tag nrho cov hauv qab no nta lub thoob khib nyiab hauv pliaj vaults thiab lub hauv paus dome hla ib chav tsev yim sab?
Lub Basilica ntawm Constantine suav nrog cov thawv ntim khoom, lub puab tsaig vaults, thiab lub hauv paus dome hla ib chav yim sab. Roman dub thiab dawb mosaics feem ntau tshwm sim ntawm phab ntsa ntawm tsev
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Koj puas tuaj yeem ua ob sab laug koom hauv SQL?
Yog nws ua tau. Koj xav tau ib qho ON rau txhua lub rooj sib koom. Incidentally kuv tus kheej formatting nyiam rau complex SQL yog piav nyob rau hauv http://bentilly.blogspot.com/2011/02/sql-formatting-style.html. Yog tias koj yuav sau ntau qhov no, nws yuav pab tau