在表中添加列[关闭]

Posted 2023-05-09

【中文标题】在表中添加列[关闭]

【英文标题】：Add Column in a table [closed]

【发布时间】：2021-04-29 11:45:54

【问题描述】：

我正在尝试在表 salesperson 中添加一列。它显示错误。请帮忙。我用的是最新版的pycharm

mycon = mysql.connector.connect(host='localhost', user='root', passwd='paswd', database='11b')
if mycon.is_connected():
    print('Connection established sucessfully.')
else:
    print('Connection not established.')
mycursor = mycon.cursor()

command = "alter table salesperson add name data"
name= input("Enter the name of column you want to :")
data= input("Enter the data type of the column:")
mycursor.execute(command)

query = "Select*from salesperson"
mycursor.execute(query)
result = mycursor.fetchall()
mycon.commit()
for i in result:
    print(i)

【问题讨论】：

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这能回答你的问题吗？ String formatting in Python

【参考方案1】：

您似乎在命令变量中使用了名称和数据变量，但您以错误的顺序声明它们。此外，您的命令变量应该是一个 f 字符串。我建议你尝试这样的事情：

mycon = mysql.connector.connect(host='localhost', user='root', passwd='paswd', database='11b')
if mycon.is_connected():
    print('Connection established sucessfully.')
else:
    print('Connection not established.')
mycursor = mycon.cursor()

name= input("Enter the name of column you want to :")
data= input("Enter the data type of the column:")
command = f"alter table salesperson add name data"
mycursor.execute(command)

query = "Select*from salesperson"
mycursor.execute(query)
result = mycursor.fetchall()
mycon.commit()
for i in result:
    print(i)