Cov txheej txheem:
Video: Yuav siv pandas SQL li cas?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov kauj ruam kom tau txais los ntawm SQL mus rau Pandas DataFrame
- Kauj ruam 1: Tsim ib tug database. Thaum xub thawj, kuv tsim cov ntaub ntawv hauv MS Access, qhov twg:
- Kauj ruam 2: Txuas Python rau MS Access. Tom ntej no, kuv tsim kev sib txuas ntawm Python thiab MS Access siv pyodbc pob.
- Kauj ruam 3: Sau tus SQL ntawv nug.
- Kauj ruam 4: Muab cov teb rau hauv DataFrame.
Ib yam li ib tug yuav nug, Panda puas zoo li SQL?
Pandas . Tsis zoo li SQL ntawv , Pandas muaj built-in functions uas pab thaum koj tsis txawm paub tias cov ntaub ntawv zoo li cas nyiam . Qhov no yog qhov tshwj xeeb tshaj yog thaum cov ntaub ntawv twb nyob rau hauv ib hom ntawv (. csv,.
Qhov thib ob, yog SQL sai dua pandas? A Pandas dataframe zoo li lub rooj hauv SQL ntawv … Txawm li cas los xij, Wes paub qhov ntawd SQL ntawv yog ib tug dev nyob rau hauv cov nqe lus ntawm ceev. Txhawm rau tawm tsam tias nws tau tsim cov dataframe rau saum NumPy arrays. Qhov no ua rau lawv ntau heev sai dua thiab nws kuj txhais tau tias nws ua rau tag nrho lwm yam munging thiab wrangling sai dua kuj.
Hauv qhov no, koj siv panda li cas?
Thaum koj xav siv Pandas rau kev txheeb xyuas cov ntaub ntawv, koj feem ntau yuav siv nws hauv ib qho ntawm peb txoj kev sib txawv:
- Hloov cov Python cov npe, phau ntawv txhais lus lossis Numpy array rau Pandas cov ntaub ntawv.
- Qhib cov ntaub ntawv hauv zos siv Pandas, feem ntau yog CSV cov ntaub ntawv, tab sis kuj tseem tuaj yeem yog cov ntaub ntawv tsis txwv (xws li TSV), Excel, thiab lwm yam.
Puas yog Python zoo dua SQL?
SQL ntawv muaj ntau yam yooj yim thiab nqaim cov lus txib piv rau Python . Hauv SQL ntawv , cov lus nug yuav luag tsuas yog siv qee qhov kev sib koom ua ke ntawm JOINS, aggregate functions, thiab subqueries functions. Python , los ntawm qhov sib txawv, zoo li ib qho kev sau ntawm cov Lego tshwj xeeb, txhua tus muaj lub hom phiaj tshwj xeeb.
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