pymysql.err.InternalError: (1054, "Unknown column 'firsttitle' in 'field list'")

import pymysql

conn1 = pymysql.connect(host="127.0.0.1",user="root",password="1234",db="mypydb")

x = 'firsttitle'
y = 'firstkeyword'

sql = "INSERT INTO mytb(title,keywd) VALUES(%s,%s)"%(x,y)

conn1.query(sql)
conn1.commit()

我得到的错误是：

File "/home/feng/PycharmProjects/dangdang/mycwpjt/mycwpjt/spiders/my_sql.py", line 15, in 
    conn1.query(sql)
  File "/usr/local/lib/python3.5/dist-packages/pymysql/connections.py", line 860, in query
    self._affected_rows = self._read_query_result(unbuffered=unbuffered)
  File "/usr/local/lib/python3.5/dist-packages/pymysql/connections.py", line 1061, in _read_query_result
    result.read()
  File "/usr/local/lib/python3.5/dist-packages/pymysql/connections.py", line 1349, in read
    first_packet = self.connection._read_packet()
  File "/usr/local/lib/python3.5/dist-packages/pymysql/connections.py", line 1018, in _read_packet
    packet.check_error()
  File "/usr/local/lib/python3.5/dist-packages/pymysql/connections.py", line 384, in check_error
    err.raise_mysql_exception(self._data)
  File "/usr/local/lib/python3.5/dist-packages/pymysql/err.py", line 107, in raise_mysql_exception
    raise errorclass(errno, errval)
pymysql.err.InternalError: (1054, "Unknown column 'firsttitle' in 'field list'")

解决方案：

把这一行代码

sql = "INSERT INTO mytb(title,keywd) VALUES(%s,%s)"%(x,y)

改为：

sql = "INSERT INTO mytb(title,keywd) VALUES('%s','%s')"%(x,y)