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Python连接MySQL及对其操作

WBOY
WBOYOriginal
2016-06-07 15:25:171102browse

论文实验涉及,主要是记个笔记,见谅!下面是测试代码(实现数据库、表建立、插入数据、查询数据、更新数据): # -*- coding: cp936 -*-import MySQLdbtry: conn=MySQLdb.connect(host=localhost,user=root,passwd=19900216) #conn=MySQLdb.connect(host=lo

论文实验涉及,主要是记个笔记,见谅!下面是测试代码(实现数据库、表建立、插入数据、查询数据、更新数据):

# -*- coding: cp936 -*-
import MySQLdb


try:
    conn=MySQLdb.connect(host='localhost',user='root',passwd='19900216')
    #conn=MySQLdb.connect(host='localhost',user='root',passwd='19900216',db='world')
    #print "conn=",conn;
    cur=conn.cursor()
    #print "cur=",cur;
    cur.execute('create database if not exists python')
    conn.select_db('python')
    cur.execute('create table test(id int,info varchar(20))')
    value=[1,'hi rollen']
    cur.execute('insert into test values(%s,%s)',value)
    
    values=[]
    for i in range(9):
        values.append((i,'hi rollen'+str(i)))

    cur.executemany('insert into test values(%s,%s)',values)
    conn.commit()
    test=cur.execute('select * from test')
    print test #记录条数
    result=cur.fetchone()
    print 'ID: %s info %s' %result
    results=cur.fetchmany(5)
    for r in results:
        print r

    cur.scroll(0,mode='absolute')

    results=cur.fetchall()
    for r in results:
        print r[1]
    cur.execute('update test set info="I am rollen" where id=3')

    conn.commit()
    cur.close()
    conn.close()
except MySQLdb.Error,e:
    print "Mysql Error %d: %s" %(e.args[0],e.args[1])


代码注释:

代码中有很多类似xxxone、xxxmany,xxxmany的函数,作用比较好懂!

scroll(self,value,mode):移动指针到某一行。如果mode=‘relative’,则表示从当前所在行移动value条,如果mode=‘absolute’,表示从结果集的第一行移动value条


Q&A:

①Q:Mysql Notifier无法start mysql服务

A:进入Manage Items,删除服务后,再重新添加服务


②Q提示python、mysql不是内部或外部命令……,A:添加变量到PATH;


③Q装MySQL-python时,出现错误.一般是因为缺少visual c++的东西,或者安装的是64位的python

A:安装提示所缺少的东西后,再安装MySQL-python;或者尝试安装MySQL-python-1.2.5.win-amd64-py2.7



参考资料:

http://blog.csdn.net/lishan9133/article/details/7024989

http://www.cr173.com/html/27032_1.html

http://www.cnblogs.com/fnng/p/4115607.html

http://blog.sina.com.cn/s/blog_82a927880102uwty.html

http://www.crifan.com/python_install_module_mysql_mysqldb/

http://www.cnblogs.com/rollenholt/archive/2012/05/29/2524327.html



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