Python操作Mysql

Posted 2020-12-25 yddyy

下载安装模块

pip3 install mysql

使用操作

1.在python中使用sql语句

import pymysql

conn = pymysql.connect(host=‘127.0.0.1‘, port=3306, user=‘root‘, passwd=‘0123‘, db=‘test1‘, charset=‘utf8‘)#创建连接

cursor = conn.cursor()#创建游标

effect_row = cursor.execute(‘insert into user_info(name,part_nid)values("xiaohei", "1")‘)#查询数据
conn.commit()#提交操作

r = cursor.execute(‘select * from user_info where nid="1"‘)

conn.commit()

print(r, cursor.fetchall())#输出受影响的行数和执行的结果

cursor.scroll(0, mode=‘absolute‘)#设置内部指针的位置，绝对位置熊0开始

print(r, cursor.fetchone())

a = cursor.execute(‘select * from user_info where nid in (3,5)‘)

conn.commit()

print(a, cursor.fetchall())

cursor.close()#关闭游标

conn.close()#关闭连接

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2.游标设置为字典类型

1 cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)

3.获取新创建数据自增id

1 new_id = cursor.lastrowid

4.关于fetch

fetchall()#获取全部数据

fetchone()#获取第一条

fetchmany(n)#获取多条

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