python连接mysql数据库

python连接mysql数据库简单案例

1. 1. 
      
2. 安装启动mysql
   
3. 创建数据库与表结构
   ​​CREATE DATABASE /*!32312 IF NOT EXISTS*/`test` /*!40100 DEFAULT CHARACTER SET utf8 */; USE `test`; DROP TABLE IF EXISTS `user`; CREATE TABLE `user` ( `id` bigint(11) NOT NULL AUTO_INCREMENT, `username` varchar(255) NOT NULL, `password` varchar(255) NOT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8; insert into `user`(`id`,`username`,`password`) values (1,'user','e10adc3949ba59abbe56e057f20f883e'),(2,'admin','e10adc3949ba59abbe56e057f20f883e'); ​​
4. 导入pymysql模块
   ​​pip install pymysql ​​
5. 编写代码
   ​​import pymysql # 打开链接 conn = pymysql.connect(host="localhost", user="root", password="root", database="test") # 获取游标 cur = conn.cursor() # 执行sql，返回受影响的行数或者查询结果的条数 result = cur.execute("select * from user") # 提交事务(如果是更新操作) # conn.commit() print("查询到:%s条数据" % result) # 查询所有 result_list = cur.fetchall() print(result_list) cur.close() conn.close() ​​
6. 控制台输出
   ​​查询到:2条数据 ((1, 'user', 'e10adc3949ba59abbe56e057f20f883e'), (2, 'admin', 'e10adc3949ba59abbe56e057f20f883e')) ​​
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