python-05

首先是安装工具

Linux

• 安装mysql：mysql-server
• 安装python-mysql模块： python-mysqldb

Windows

• 下载安装mysql
• python操作mysql模块：MySQL-python-1.2.3.win32-py2.7.exe 或 MySQL-python-1.2.3.win-amd64-py2.7.exe
• mysql图形界面：Navicat_for_MySQL

创建数据库

create table students
    (
        id int  not null auto_increment primary key,
        name char(8) not null,
        sex char(4) not null,
        age tinyint unsigned not null,
        tel char(13) null default "-"
    );

插入一条数据： insert into student  (name,sex,age,tel) values('test','man',19,'123456777')

MySQLdb的操作：
查询

 #!/usr/bin/env python
 #-*- encoding: utf-8 -*-

 import MySQLdb

 conn = MySQLdb.connect(host='127.0.0.1', user = 'root',passwd ='',db='yangshanlei')  #连接mysql
 cur = conn.cursor()   #创建游标

 reCount = cur.execute('select * from students')   #查询sql语句
 data = cur.fetchall()     #把得到的数据都拿出来

 cur.close()   #关闭游标
 conn.close()  #关闭连接

 print reCount    #查询出影响行数
 print data

查询

insert

 #!/usr/bin/env python
 #-*- encoding: utf-8 -*-

 import MySQLdb

 conn = MySQLdb.connect(host='127.0.0.1', user = 'root',passwd ='',db='yangshanlei')  #连接mysql
 cur = conn.cursor()   #创建游标

 sql = "insert into students  (name,sex,age,tel) values(%s,%s,%s,%s)"
 params = ('yang','man',19,'')    

 reCount = cur.execute(sql,params)
 conn.commit()        #insert update delete都需要加上commit

 cur.close()   #关闭游标
 conn.close()  #关闭连接

 print reCount    #查询出影响行数

插入一行

 #!/usr/bin/env python
 #-*- encoding: utf-8 -*-

 import MySQLdb

 conn = MySQLdb.connect(host='127.0.0.1', user = 'root',passwd ='',db='yangshanlei')  #连接mysql
 cur = conn.cursor()   #创建游标

 li =[
      ('www','usa',19,''),
      ('sss','usa',19,'')
      ]

 reCount = cur.executemany("insert into students (name,sex,age,tel) values(%s,%s,%s,%s)",li)  

 conn.commit()        #insert update delete都需要加上commit
 cur.close()   #关闭游标
 conn.close()  #关闭连接

 print reCount    #查询出影响行数

插入多行

delete

 #!/usr/bin/env python
 #-*- encoding: utf-8 -*-

 import MySQLdb

 conn = MySQLdb.connect(host='127.0.0.1', user = 'root',passwd ='',db='yangshanlei')  #连接mysql
 cur = conn.cursor()   #创建游标

 sql = "delete from students where name =%s"
 params = ('test1',)    

 reCount = cur.execute(sql,params)
 conn.commit()        #insert update delete都需要加上commit

 cur.close()   #关闭游标
 conn.close()  #关闭连接

 print reCount    #查询出影响行数

delete

update

 #!/usr/bin/env python
 #-*- encoding: utf-8 -*-

 import MySQLdb

 conn = MySQLdb.connect(host='127.0.0.1', user = 'root',passwd ='',db='yangshanlei')  #连接mysql
 cur = conn.cursor()   #创建游标

 sql = "update students set name  = %s  where id = 1"
 params = ('sb',)    

 reCount = cur.execute(sql,params)
 conn.commit()        #insert update delete都需要加上commit

 cur.close()   #关闭游标
 conn.close()  #关闭连接

 print reCount    #查询出影响行数

update

 #!/usr/bin/env python
 #-*- encoding: utf- -*-
 import MySQLdb

 class helperall(object):
     def __init__(self):
         pass

     def Get_Dict(self,sql,params):
         #conn = MySQLdb.connect('127.0.0.1','root','','yangshanlei')
         conn = MySQLdb.connect(host='127.0.0.1', user = 'root',passwd ='',db='yangshanlei')
         cur = conn.cursor()

         reCount = cur.execute(sql,params)
         date = cur.fetchall()

         cur.close()
         conn.close()

         return date

     def Get_One(self,sql,params):
         conn = MySQLdb.connect('127.0.0.1','root','','yangshanlei')
         cur = conn.cursor() #打开游标

         reCount = cur.execute(sql,params)
         data = cur.fetchone()

         cur.close()
         conn.close()
         return data

     def Get_insertone(self,sql,params):
         conn = MySQLdb.connect('127.0.0.1','root','','yangshanlei')
         cur = conn.cursor()

         reCount = cur.execute(sql,params)
         conn.commit()

         cur.close()
         conn.close()
         return reCount

     def Get_insertall(self,sql,li):
         conn = MySQLdb.connect('127.0.0.1','root','','yangshanlei')
         cur = conn.cursor()      

         reCount = cur.executemany(sql,li)  

         conn.commit()        #insert update delete都需要加上commit
         cur.close()
         conn.close()

 '''
 #插入多次
 helper = helperall()
 li =[
          ('ww1','usa'),
          ('ss1','usa')
          ]
 sql = "insert into students  (name,sex) values(%s,%s)"
 dicct_insertall = helper.Get_insertall(sql,li)
 print dicct_insertall
 '''
 '''
 #插入一次
 helper = helperall()
 sql = "insert into students  (name,sex) values(%s,%s)"
 params = ('yangshan','man')
 dicct_insert = helper.Get_insertone(sql,params)
 print dicct_insert
 '''
 '''
 #查询
 helper = helperall()
 sql = "select *  from students   where id > %s"
 params = (,)
 dict_data = helper.Get_Dict(sql,params)  #查询全部
 dict_one = helper.Get_One(sql,params)     #查询1次
 print dict_data
 print dict_one
 '''