Python3.6简单操作Mysql数据库

转载  2017-09-12   作者:方程同调士   我要评论

这篇文章主要为大家详细介绍了Python3.6简单操作Mysql数据库,具有一定的参考价值,感兴趣的小伙伴们可以参考一下

本文为大家分享了Python3.6操作Mysql数据库的具体实例,供大家参考,具体内容如下

安装pymysql

参考https://github.com/PyMySQL/PyMySQL/

pip install pymsql

实例一

import pymysql

# 创建连接
# 参数依次对应服务器地址,用户名,密码,数据库
conn = pymysql.connect(host='127.0.0.1', user='root', passwd='123456', db='demo')

# 创建游标
cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)

# 执行语句返回影响的行数
effect_row = cursor.execute("select * from course")
print(effect_row)
# 获取所有数据
result = cursor.fetchall()
result = cursor.fetchone() # 获取下一个数据
result = cursor.fetchone() # 获取下一个数据(在上一个的基础之上)
# cursor.scroll(-1, mode='relative') # 相对位置移动
# cursor.scroll(0,mode='absolute') # 绝对位置移动

# 提交,不然无法保存新建或者修改的数据
conn.commit()
# 关闭游标
cursor.close()
# 关闭连接
conn.close()

实例二

import pymysql
# 建立连接
conn = pymysql.connect(host='127.0.0.1', user='root', passwd='123456', db='demo')
# 创建游标
cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
# 插入一条数据 %s是占位符 占位符之间用逗号隔开
effect_row = cursor.execute("insert into course(cou_name,time) values(%s,%s)", ("Engilsh", 100))
print(effect_row)
conn.commit()
cursor.close()

conn.close()

实例三

import pymysql.cursors

# Connect to the database
connection = pymysql.connect(host='localhost',
        user='user',
        password='passwd',
        db='db',
        charset='utf8mb4',
        cursorclass=pymysql.cursors.DictCursor)

try:
 with connection.cursor() as cursor:
  # Create a new record
  sql = "INSERT INTO `users` (`email`, `password`) VALUES (%s, %s)"
  cursor.execute(sql, ('webmaster@python.org', 'very-secret'))

 # connection is not autocommit by default. So you must commit to save
 # your changes.
 connection.commit()

 with connection.cursor() as cursor:
  # Read a single record
  sql = "SELECT `id`, `password` FROM `users` WHERE `email`=%s"
  cursor.execute(sql, ('webmaster@python.org',))
  result = cursor.fetchone()
  print(result)
finally:
 connection.close()

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。

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