Cov txheej txheem:
Video: Kuv yuav suav hnub ua haujlwm li cas hauv SQL?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Hauv txoj hauv kev no, peb siv ob peb kauj ruam uas siv DATEDIFF thiab DATEPART ua haujlwm kom ua tiav cov hnub ua haujlwm
- Kauj ruam 1: xam tag nrho cov naj npawb ntawm hnub nruab nrab ntawm ib hnub twg.
- Kauj ruam 2: xam tus naj npawb tag nrho ntawm lub lis piam ntawm ib hnub.
- Kauj Ruam 3: Tshem tawm cov hnub so tsis tiav.
Tsuas yog li ntawd, kuv yuav suav hnub li cas ntawm ob hnub hauv SQL Server?
PRINT DATEDIFF(HNUB, '1/1/2011', '3/1/2011') yuav muab koj li cas tom qab. Qhov no muab cov tus lej ntawm lub sij hawm hla ib tag hmo nruab nrab tus ob hnub . Koj tuaj yeem txiav txim siab xav tau ntxiv ib qho rau qhov no yog tias koj suav nrog ob qho tib si hnub tim hauv suav - lossis rho ib qho yog tias koj tsis xav suav nrog hnub.
Ib yam li ntawd, kuv yuav xam hnub tsis suav hnub so hauv SQL li cas? Koj tuaj yeem yooj yim siv datediff muaj nuj nqi ntawm sql ua . thiab tom qab ntawd koj tuaj yeem rho tawm hnub so nruab nrab ntawm cov hnub yog tias muaj. Piv txwv li kos cov lus nug hauv qab no. Thiab yog tias koj xav tau cais tawm nyiaj so koobtsheej dhau lawm, ces, Koj kuj tau xam hnub so ntawm hnub pib / xaus thiab tuaj yeem rho tawm ntawm qhov kev xaiv zaum kawg.
Ib yam li ntawd, koj yuav suav hnub ua haujlwm li cas?
Rau xam tus lej ntawm hnub ua haujlwm nruab nrab ntawm ob hnub, koj tuaj yeem siv NETWORKDAYS muaj nuj nqi. NETWORKDAYS cia li tsis suav cov hnub so, thiab nws tuaj yeem xaiv tsis suav nrog cov npe kev cai hnub so thiab. Nco ntsoov tias NETWORKDAYS suav nrog cov hnub pib thiab hnub kawg hauv kev suav yog tias lawv yog hnub ua haujlwm.
Kuv yuav suav pes tsawg hnub hauv ib hlis hauv SQL li cas?
Txheej Txheem: Thaum EOMONTH siv, txawm li cas los xij lub hnub hom peb siv nws yog hloov dua siab tshiab rau hauv DateTime hom ntawv SQL ntawv - server. Tom qab ntawd hnub tso tawm ntawm EOMONTH() yuav yog 2016-12-31 muaj 2016 xyoo, 12 raws li Lub hli thiab 31 as Hnub . Cov zis no thaum dhau mus rau Hnub() nws muab rau koj tag nrho cov hnub suav hauv hli.
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