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实现MySQL和Python简单博客系统的步骤:
数据库设计
- 创建一个名为
blog
的数据库。 - 使用以下语句创建两个表:
CREATE TABLE posts (
id INT NOT NULL AUTO_INCREMENT,
title VARCHAR(255) NOT NULL,
content TEXT NOT NULL,
author VARCHAR(255) NOT NULL,
created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
PRIMARY KEY (id)
);
CREATE TABLE users (
id INT NOT NULL AUTO_INCREMENT,
username VARCHAR(255) UNIQUE NOT NULL,
password VARCHAR(255) NOT NULL,
PRIMARY KEY (id)
);
Python脚本
1、导入必要的模块
import mysql.connector
2、建立数据库连接
mydb = mysql.connector.connect(
host="localhost",
user="root",
password="",
database="blog"
)
3、创建游标
mycursor = mydb.cursor()
4、添加新帖子
sql = "INSERT INTO posts (title, content, author) VALUES (%s, %s, %s)"
val = (title, content, author)
mycursor.execute(sql, val)
mydb.commit()
5、获取所有帖子
sql = "SELECT * FROM posts"
mycursor.execute(sql)
myresult = mycursor.fetchall()
6、根据ID获取帖子
sql = "SELECT * FROM posts WHERE id = %s"
val = (post_id,)
mycursor.execute(sql, val)
myresult = mycursor.fetchone()
7、更新帖子
sql = "UPDATE posts SET title = %s, content = %s WHERE id = %s"
val = (new_title, new_content, post_id)
mycursor.execute(sql, val)
mydb.commit()
8、删除帖子
sql = "DELETE FROM posts WHERE id = %s"
val = (post_id,)
mycursor.execute(sql, val)
mydb.commit()
9、创建新用户
sql = "INSERT INTO users (username, password) VALUES (%s, %s)"
val = (username, password)
mycursor.execute(sql, val)
mydb.commit()
10、验证用户
sql = "SELECT * FROM users WHERE username = %s AND password = %s"
val = (username, password)
mycursor.execute(sql, val)
myresult = mycursor.fetchone()
11、关闭连接
mycursor.close()
mydb.close()
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