Python / Pandas / SQL 表问题

Question

我希望有人可以帮助我，我有一个使用 Python 和 SQlite 完成大学课程的任务。

我有两张 Excel 表格，我想将它们分成两张表格，并在一些财务信息上进行左连接。我已经开始将两张表导入熊猫，我认为是创建两张表，但老实说，我不知道我哪里出错了。电子表格包含的列比我想在 SQL 数据库中使用的多得多。这会是个问题吗？

我最终收到错误代码“OperationalError: table Lockedlist has no column named Site Ref”

import pandas as pd

Lockedlist_panda = pd.read_excel (r'Location of Lockedlist_panda')
PO1report_panda = pd.read_excel (r'Location of PO1report_panda')

import sqlite3
conn = sqlite3.connect("data_superstore1.db")
cursor = conn.cursor()
sql='''CREATE TABLE Lockedlist (
    NR TEXT,
    Programme TEXT NOT NULL,
    Sub_Region TEXT NOT NULL,
    Site_Type TEXT NOT NULL,
    MS13_Actual TEXT NOT NULL,
    PRIMARY KEY(NR)
    )'''

cursor.execute(sql)
print("Table created successfully........")

#Commit your changes in the database
conn.commit()

#Closing the connection
conn.close()

conn = sqlite3.connect("data_superstore1.db")
cursor = conn.cursor()
sql='''CREATE TABLE PoReportTable (
    Tracking_Field TEXT,
    VENDOR TEXT NOT NULL,
    Short_Text TEXT NOT NULL,
    COST INT NOT NULL,
    PRIMARY KEY(Tracking_Field)
    )'''

cursor.execute(sql)
print("Table created successfully........")

#Commit your changes in the database
conn.commit()

#Closing the connection
conn.close()

conn = sqlite3.connect("data_superstore1.db")
Lockedlist_panda.to_sql('Lockedlist', conn, if_exists='append', index=False)
PO1report_panda.to_sql('PoReportTable', conn, if_exists='append', index=False)

#Commit your changes in the database
conn.commit()

#Closing the connection
conn.close()

Answer 1

确实，pandas 会尝试将数据框中的所有列插入数据库，因此，如果它的列多于您在数据库中定义的列，它将抱怨缺少的列，

尝试首先将您的数据框限制为您想要的列：

Lockedlist_panda = Lockedlist_panda[["NR","Programme","Sub_Region","Site_Type","MS13_Actual" ]]