pymysql

一、pymysql

　　pymsql是Python中操作MySQL的模块，其使用方法和MySQLdb几乎相同，我们今天来说下pymsql用法。MySQLdb的只有在python2 里面使用的，在python3里面需要用pymysql。

二、安装pymysql

pip3 install pymysql

　

三、使用

　　3.1 连接mysql

# -*- coding: UTF-8 -*-

import pymysql

#  创建连接
conn = pymysql.connect(host='172.16.200.49', port=3306,
                       user='bigberg', password='111111',
                       db='study')

# 创建游标
cursor = conn.cursor()

# 执行SQL，并返回受影响行数
effect_row = cursor.execute("select * from student")
print(effect_row)
# 执行SQL，并返回受影响行数
# data = [
#     ('S1','2018-04-21','M'),
#     ('S2','2018-05-11','F'),
#     ('S3','2018-04-25','M')
# ]
# sql = "insert into student (name,register_date,gender) values (%s,%s,%s)"
# effect_row = cursor.executemany(sql,data)
# 提交，不然无法保存
conn.commit()

# 关闭游标
cursor.close()

# 关闭连接
conn.close()

　　3.2 获取查询的数据

# -*- coding: UTF-8 -*-

import pymysql

#  创建连接
conn = pymysql.connect(host='172.16.200.49', port=3306,
                       user='bigberg', password='111111',
                       db='study')

cursor = conn.cursor()
sql = "select * from student where stu_id>3"
cursor.execute(sql)
# 获取第一行数据
# result = cursor.fetchone()

# 获取前n条数据
# result = cursor.fetchmany(3)

# 获取所有数据
result = cursor.fetchall()
print(result)

conn.commit()
cursor.close()
conn.close()

　　3.3 fetch数据类型

import pymysql

#  创建连接
conn = pymysql.connect(host='172.16.200.49', port=3306,
                       user='bigberg', password='111111',
                       db='study',)
# 游标设置为字典类型
cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)