search
HomeBackend DevelopmentPython TutorialIntroducing the simple method of operating Mysql database in Python3.6

This article mainly introduces the simple operation of Mysql database with Python3.6 in detail. It has certain reference value. Interested friends can refer to it.

This article shares the operation of Python3.6 with everyone. Specific examples of Mysql database are for your reference. The specific content is as follows

Install pymysql

Reference https://github.com/PyMySQL/PyMySQL/


pip install pymsql

Example one


##

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()

Example two


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()

Example 3


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()

The above is the detailed content of Introducing the simple method of operating Mysql database in Python3.6. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
图文详解mysql架构原理图文详解mysql架构原理May 17, 2022 pm 05:54 PM

本篇文章给大家带来了关于mysql的相关知识,其中主要介绍了关于架构原理的相关内容,MySQL Server架构自顶向下大致可以分网络连接层、服务层、存储引擎层和系统文件层,下面一起来看一下,希望对大家有帮助。

mysql怎么替换换行符mysql怎么替换换行符Apr 18, 2022 pm 03:14 PM

在mysql中,可以利用char()和REPLACE()函数来替换换行符;REPLACE()函数可以用新字符串替换列中的换行符,而换行符可使用“char(13)”来表示,语法为“replace(字段名,char(13),'新字符串') ”。

mysql怎么去掉第一个字符mysql怎么去掉第一个字符May 19, 2022 am 10:21 AM

方法:1、利用right函数,语法为“update 表名 set 指定字段 = right(指定字段, length(指定字段)-1)...”;2、利用substring函数,语法为“select substring(指定字段,2)..”。

mysql的msi与zip版本有什么区别mysql的msi与zip版本有什么区别May 16, 2022 pm 04:33 PM

mysql的msi与zip版本的区别:1、zip包含的安装程序是一种主动安装,而msi包含的是被installer所用的安装文件以提交请求的方式安装;2、zip是一种数据压缩和文档存储的文件格式,msi是微软格式的安装包。

mysql怎么将varchar转换为int类型mysql怎么将varchar转换为int类型May 12, 2022 pm 04:51 PM

转换方法:1、利用cast函数,语法“select * from 表名 order by cast(字段名 as SIGNED)”;2、利用“select * from 表名 order by CONVERT(字段名,SIGNED)”语句。

MySQL复制技术之异步复制和半同步复制MySQL复制技术之异步复制和半同步复制Apr 25, 2022 pm 07:21 PM

本篇文章给大家带来了关于mysql的相关知识,其中主要介绍了关于MySQL复制技术的相关问题,包括了异步复制、半同步复制等等内容,下面一起来看一下,希望对大家有帮助。

带你把MySQL索引吃透了带你把MySQL索引吃透了Apr 22, 2022 am 11:48 AM

本篇文章给大家带来了关于mysql的相关知识,其中主要介绍了mysql高级篇的一些问题,包括了索引是什么、索引底层实现等等问题,下面一起来看一下,希望对大家有帮助。

mysql怎么判断是否是数字类型mysql怎么判断是否是数字类型May 16, 2022 am 10:09 AM

在mysql中,可以利用REGEXP运算符判断数据是否是数字类型,语法为“String REGEXP '[^0-9.]'”;该运算符是正则表达式的缩写,若数据字符中含有数字时,返回的结果是true,反之返回的结果是false。

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

SublimeText3 Linux new version

SublimeText3 Linux new version

SublimeText3 Linux latest version

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools