寒假学习进度-6（Python连接MySQL数据库）

Python连接mysql和操作

软件：pycharm

开始在pycharm下面的Terminal中安装mysql时提醒pip版本不够，所以需要先升级一下pip

python -m pip install --upgrade pip

升级完pip之后就可以下载mysql

pip install mysql

下载完成后在setting中查看

进行代码测试

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import MySQLdb
db =MySQLdb.connect("localhost","root","liu123","test",charset=‘utf8‘)
cursor=db.cursor()
cursor.execute("SELECT VERSION()")
data=cursor.fetchone()
print ("Database version : %s" % data)
db.colse()

Database version : 5.7.10-log

插入

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import MySQLdb
db =MySQLdb.connect("localhost","root","liu123","test",charset=‘utf8‘)
cursor=db.cursor()
sql="insert into admin(account,passwd) values (‘abc‘,‘123456789‘)"
try:
    cursor.execute(sql)
    db.commit()
except:
    db.rollback()
db.close()

查找

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import MySQLdb
db =MySQLdb.connect("localhost","root","liu123","test",charset=‘utf8‘)
cursor=db.cursor()
sql="select * from admin"
try:
    cursor.execute(sql)
    results=cursor.fetchall()
    for row in results:
        account=row[0]
        password=row[1]
        print("account=%s,password=%s" % (account,password))
except:
    print("Error:unable to fetch data")
db.close()

更新

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import MySQLdb
db =MySQLdb.connect("localhost","root","liu123","test",charset=‘utf8‘)
cursor=db.cursor()
sql="update admin set passwd = 987654321 where account =‘root‘"
try:
    cursor.execute(sql)
    db.commit()
except:
    db.rollback()
db.close()

删除

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import MySQLdb
db =MySQLdb.connect("localhost","root","liu123","test",charset=‘utf8‘)
cursor=db.cursor()
sql="delete from admin where account =‘root‘"
try:
    cursor.execute(sql)
    db.commit()
except:
    db.rollback()
db.close()