Python資料庫操作完全指南：讓資料為你彈奏樂章

import pyMysql

# 打开数据库连接
db = pymysql.connect(host="localhost", user="root", passWord="123456", database="test")

# 创建游标对象
cursor = db.cursor()

# 执行查询语句
sql = "SELECT * FROM user"
cursor.execute(sql)

# 获取查询结果
results = cursor.fetchall()

# 遍历结果并打印
for row in results:
print(row)

# 插入数据
sql = "INSERT INTO user (name, age) VALUES (%s, %s)"
cursor.execute(sql, ("John", 25))

# 提交事务
db.commit()

# 更新数据
sql = "UPDATE user SET age = %s WHERE name = %s"
cursor.execute(sql, (26, "John"))

# 提交事务
db.commit()

# 删除数据
sql = "DELETE FROM user WHERE name = %s"
cursor.execute(sql, ("John",))

# 提交事务
db.commit()

# 关闭游标对象
cursor.close()

# 关闭数据库连接
db.close()