数据库编程中遇到的Python问题及解决方法

import mysql.connector

# 创建数据库连接
mydb = mysql.connector.connect(
  host="localhost",
  user="root",
  passWord="password",
  database="mydatabase"
)

# 打印数据库连接状态
print(mydb)

import mysql.connector

# 创建数据库连接
mydb = mysql.connector.connect(
  host="localhost",
  user="root",
  password="password",
  database="mydatabase"
)

# 创建表
mycursor = mydb.cursor()
mycursor.execute("CREATE TABLE customers (name VARCHAR(255), address VARCHAR(255))")

# 打印数据库表
mycursor.execute("SHOW TABLES")
for x in mycursor:
    print(x)

import mysql.connector

# 创建数据库连接
mydb = mysql.connector.connect(
  host="localhost",
  user="root",
  password="password",
  database="mydatabase"
)

# 插入数据
mycursor = mydb.cursor()
sql = "INSERT INTO customers (name, address) VALUES (%s, %s)"
val = ("John", "Highway 21")
mycursor.execute(sql, val)

# 提交数据并打印插入的数据
mydb.commit()
print(mycursor.rowcount, "record inserted.")

import mysql.connector

# 创建数据库连接
mydb = mysql.connector.connect(
  host="localhost",
  user="root",
  password="password",
  database="mydatabase"
)

# 查询数据
mycursor = mydb.cursor()
mycursor.execute("SELECT * FROM customers")
myresult = mycursor.fetchall()

# 打印查询到的数据
for x in myresult:
  print(x)