Python操作mysql之模块pymysql

pymsql是Python中操作MySQL的模块，其使用方法和MySQLdb几乎相同。但目前pymysql支持python3.x而后者不支持3.x版本。

本文环境 python3.6.1  Mysql 5.7.18

1、安装模块

pip3 install pymysql

2、python操作

1) 获取查询数据

#!/usr/bin/env python
# -*- coding:utf-8 -*-
import pymysql
# 创建连接
conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='redhat', db='homework',charset='utf8')
# 创建游标
cursor = conn.cursor()

# 执行SQL
cursor.execute("select * from student")

#获取剩余结果的第一行数据
#row_1 = cursor.fetchone()
#获取前n行数据
#row_2 = cursor.fetchmany(3)
#获取所有查询数据
row_3 = cursor.fetchall()
print(row_3)
# 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()

2、获取新创建数据的自增id

最后插入的一条数据id

#! /usr/bin/env python
# -*- coding:utf-8 -*-
# __author__ = "Yu"
import pymysql

conn = pymysql.connect(host='127.0.0.1',port=3306, user='root', passwd='redhat', db='db3')
cursor = conn.cursor()
effect_row = cursor.executemany("insert into tb11(name,age) values(%s,%s)",
                                [("yu",""),("chao", "")])
conn.commit()
cursor.close()
conn.close()
# 获取自增id
new_id = cursor.lastrowid
print(new_id)

3、

fetch数据类型

关于默认获取的数据是元祖类型，如果想要或者字典类型的数据，即：

#! /usr/bin/env python
# -*- coding:utf-8 -*-
# __author__ = "Yu"
import pymysql

conn = pymysql.connect(host='127.0.0.1',port=3306, user='root', passwd='redhat', db='db3')

#游标设置为字典类型
cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
cursor.execute("select * from tb11")

row_1 = cursor.fetchone()
print(row_1)
conn.commit()
cursor.close()
conn.close()