Video: Pivot thiab Unpivot hauv SSIS yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Pivot - Nws hloov cov ntaub ntawv kab ib tus neeg mus rau hauv kab ntawv cais. Unpivot - Nws ua cov ntaub ntawv rov qab hloov dua siab tshiab ntawm Pivot cov ntaub ntawv. Peb tau txais cov ntaub ntawv tiag tiag tom qab Unpivot.
Tsis tas li ntawd, pivot thiab Unpivot yog dab tsi hauv SQL Server?
SQL PIVOT thiab UNPIVOT yog ob tus neeg ua haujlwm sib raug zoo uas siv los hloov cov lus qhia rau lwm tus. PIVOT yog siv thaum peb xav hloov cov ntaub ntawv los ntawm kab theem mus rau kem theem thiab UNPIVOT yog siv thaum peb xav hloov cov ntaub ntawv los ntawm kab theem mus rau kab theem.
Ib yam li ntawd, kuv yuav siv Unpivot hauv SSIS li cas? UNPIVOT Kev hloov pauv hauv SSIS Piv txwv Ob npaug nias rau nws yuav qhib cov ntaub ntawv ntws tab. Kauj ruam 2: Luag thiab tso OLE DB Source, UNPIVOT Kev hloov pauv ntawm lub cuab yeej mus rau thaj tsam cov ntaub ntawv ntws, raws li qhia hauv daim duab. KAUJ RUAM 4: Nyem rau ntawm kab tab kom txheeb xyuas cov kab. Hauv tab no, peb tuaj yeem tshem tawm cov kab tsis xav tau.
Yog li ntawd, pivot hauv SSIS yog dab tsi?
Pivot Kev hloov pauv hauv SSIS . los ntawm suresh. Cov Pivot Kev hloov pauv hauv SSIS yog siv los ua pivot kev ua haujlwm ntawm cov ntaub ntawv nkag (Cov Ntaub Ntawv Keeb Kwm). A pivot kev ua haujlwm txhais tau tias hloov cov ntaub ntawv kab ib leeg rau hauv kab sib cais. Pivot Transformation yog precisely opposite rau Unpivot Transformation.
Qhov txawv ntawm pivot thiab Unpivot yog dab tsi?
Cov PIVOT nqe lus yog siv los hloov cov kab lus rau hauv kab, thaum lub UNPIVOT tus neeg teb xov tooj hloov cov kab rov qab mus rau kab. Rov qab a PIVOT nqe lus hais txog tus txheej txheem ntawm kev thov cov UNPIVOT tus neeg teb xov tooj mus rau qhov twb PIVOTED dataset thiaj li yuav rov qab tau cov ntaub ntawv qub.
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