使用 Python 在 mysql 中插入时，出现“字段列表中的未知列”错误

如何解决使用 Python 在 mysql 中插入时，出现“字段列表中的未知列”错误

在尝试通过 python 脚本在 MysqL 中插入查询时，我面临一个错误，如“1054 (42S22)：‘字段列表’中的未知列‘Abhinav’”。有一些小的语法错误，但我找不到。

my_cursor.execute("CREATE DATABASE IF NOT EXISTS task")
my_cursor.execute("CREATE TABLE IF NOT EXISTS EmployeeList(user_id INT AUTO_INCREMENT PRIMARY KEY,EMPID INT,Emp_Name VARCHAR(100),Designation VARCHAR(100),Role VARCHAR(100),Updated_by VARCHAR(100),LastUpdate TIMESTAMP DEFAULT Now())")
EMP_ID = input("Enter the Employement Id : ")
EmpName = input("Enter the Employee Name : ")
Designations = input("Enter the Designation : ")
Roles = input("Enter the Role : ")
Updatedby = input("Enter the name of the Person updated by: ") 
try:
    sql_insert_query = f"INSERT INTO EmployeeList(EMPID,Emp_Name,Designation,Role,Updated_by) VALUES ({EMP_ID},{EmpName},{Designations},{Roles},{Updatedby})"
    my_cursor.execute(sql_insert_query)
    mydb.commit()
    print("Record inserted successfully")

except MysqL.connector.Error as error:
    print("Failed to update record to database: {}".format(error))
finally:
    if (mydb.is_connected()):
        my_cursor.close()
        mydb.close()
        print("MysqL connection is closed")

必须在运行脚本后提供用户输入的详细信息。

Enter the Employement Id : 1
Enter the Employee Name : Abhinav
Enter the Designation : Software Engineer
Enter the Role : GE
Enter the name of the Person updated by: Abhi

错误 -

Failed to update record to database: 1064 (42000): You have an error in your sql Syntax; check the manual that corresponds to your MysqL server version for the right Syntax to use near 'Engineer,GE,Abhi)' at line 1
MysqL connection is closed

解决方法

与其手动格式化 INSERT 语句，不如添加占位符并将实际值作为 params 传递给 execute 方法：

sql_insert_query = "INSERT INTO EmployeeList(EMPID,Emp_Name,Designation,Role,Updated_by) VALUES (%s,%s,%s)"
my_cursor.execute(sql_insert_query,params=(EMP_ID,EmpName,Designations,Roles,Updatedby))

以下是一些文档：https://dev.mysql.com/doc/connector-python/en/connector-python-api-mysqlcursor-execute.html