Question

我希望Python通过SELECT（SQL）显示来自Access的数据，但是有错误。数据和数据库已存在。有什么问题？

from tkinter import *
import pypyodbc
import ctypes

#Create connection
con = pypyodbc.connect('DRIVER={Microsoft Access Driver (*.mdb)};UID=admin;UserCommitSync=Yes;Threads=3;SafeTransactions=0;PageTimeout=5;MaxScanRows=8;MaxBufferSize=2048;FIL={MS Access};DriverId=25;DefaultDir=C:/Users/HP/Desktop/PITL;DBQ=C:/Users/HP/Desktop/PITL/PITL.mdb;')
cursor = con.cursor ()

form = Tk ()
form.title ("Main")
form.geometry ('400x400')

def Show ():
    cursor.execute ("SELECT `Law_ID` FROM Laws WHERE Fine='1'")
    for row in cursor:
        print (row)

Button=Button(form, text = 'PUSH ME', command = Show)
Button.pack ()

form.mainloop ()

con.commit ()
cursor.close ()
con.close ()

错误：

Exception in Tkinter callback Traceback (most recent call last):   File "C:\Users\HP\AppData\Local\Programs\Python\Python36-32\lib\tkinter\__init__.py", line 1699, in __call__
    return self.func(*args)   File "C:\Users\HP\Desktop\PITL\SHOW DATA.py", line 14, in Show
    cursor.execute ("SELECT `Law_ID` FROM Laws WHERE Fine='1'")   File "C:\Users\HP\AppData\Local\Programs\Python\Python36-32\lib\site-packages\pypyodbc-1.3.4-py3.6.egg\pypyodbc.py", line 1626, in execute
    self.execdirect(query_string)   File "C:\Users\HP\AppData\Local\Programs\Python\Python36-32\lib\site-packages\pypyodbc-1.3.4-py3.6.egg\pypyodbc.py", line 1652, in execdirect
    check_success(self, ret)   File "C:\Users\HP\AppData\Local\Programs\Python\Python36-32\lib\site-packages\pypyodbc-1.3.4-py3.6.egg\pypyodbc.py", line 1007, in check_success
    ctrl_err(SQL_HANDLE_STMT, ODBC_obj.stmt_h, ret, ODBC_obj.ansi)   File "C:\Users\HP\AppData\Local\Programs\Python\Python36-32\lib\site-packages\pypyodbc-1.3.4-py3.6.egg\pypyodbc.py", line 977, in ctrl_err
    raise DataError(state,err_text) pypyodbc.DataError: ('22018', '[22018] [Microsoft][Драйвер ODBC Microsoft Access] Несоответствие типов данных в выражении условия отбора.')

Answer 1

您使用的SQL看起来像MySQL，而不是Access SQL。

在Access SQL中，您使用方括号[]来分隔字段名称，并且不为数字添加撇号，如整数：

"SELECT [Law_ID] FROM Laws WHERE [Fine]=1"

如果Fine列实际上包含字符串，则需要撇号。

无法在Python中显示来自Access的数据（通过SQL）

1 个答案: