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  • pymysql.err.InternalError: (1054, "Unknown column 'None' in 'field list'")

    错误提示:

    Traceback (most recent call last):
      File "D:/projectwc/test/dd.py", line 43, in <module>
        effect_row = cursor.execute("insert into `222` set c={}".format(None))
      File "C:pythonlibsite-packagespymysqlcursors.py", line 166, in execute
        result = self._query(query)
      File "C:pythonlibsite-packagespymysqlcursors.py", line 322, in _query
        conn.query(q)
      File "C:pythonlibsite-packagespymysqlconnections.py", line 835, in query
        self._affected_rows = self._read_query_result(unbuffered=unbuffered)
      File "C:pythonlibsite-packagespymysqlconnections.py", line 1019, in _read_query_result
        result.read()
      File "C:pythonlibsite-packagespymysqlconnections.py", line 1302, in read
        first_packet = self.connection._read_packet()
      File "C:pythonlibsite-packagespymysqlconnections.py", line 981, in _read_packet
        packet.check_error()
      File "C:pythonlibsite-packagespymysqlconnections.py", line 393, in check_error
        err.raise_mysql_exception(self._data)
      File "C:pythonlibsite-packagespymysqlerr.py", line 107, in raise_mysql_exception
        raise errorclass(errno, errval)
    pymysql.err.InternalError: (1054, "Unknown column 'None' in 'field list'")
    import pymysql
    
    # 创建连接
    conn = pymysql.connect(host='192.168.72.135', port=3306, user='root', passwd='123456', db='test')
    # 创建游标
    cursor = conn.cursor()
    
    # 执行SQL,并返回收影响行数
    effect_row = cursor.execute("insert into `222` set c={}".format(None))
    
    
    # 提交,不然无法保存新建或者修改的数据
    conn.commit()
    
    # 关闭游标
    cursor.close()
    # 关闭连接
    conn.close()

     解决办法:

    把None 换成“Null”

    effect_row = cursor.execute("insert into `222` set c={}".format("Null"))

     还要注意字符串"Insert into  库.表 (`ID`, ....) values (123, 'Null'), ()" 如果要空值需要在替换一下

    sql = sql.replace("'Null'", "Null")
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  • 原文地址:https://www.cnblogs.com/renfanzi/p/6902822.html
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