python操作MySQL数据库

MySQLdb操作的MYSQL数据库。先来一个简单的例子:

import MySQLdb
 
try:
    conn=MySQLdb.connect(host='localhost',user='root',passwd='root',db='test',port=3306)
    cur=conn.cursor()
    cur.execute('select * from user')
    cur.close()
    conn.close()
except MySQLdb.Error,e:
     print "Mysql Error %d: %s" % (e.args[0], e.args[1])

插入数据，批量插入数据，更新数据!

import MySQLdb
 
try:
    conn=MySQLdb.connect(host='localhost',user='root',passwd='root',port=3306)
    cur=conn.cursor()
     
    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(20):
        values.append((i,'hi rollen'+str(i)))
         
    cur.executemany('insert into test values(%s,%s)',values)
 
    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])

请注意一定要有conn.commit()这句来提交事务，要不然不能真正的插入数据。

import MySQLdb
 
try:
    conn=MySQLdb.connect(host='localhost',user='root',passwd='root',port=3306,charset='utf8')
    cur=conn.cursor()
     
    conn.select_db('python')
 
    count=cur.execute('select * from test')
    print 'there has %s rows record' % count
 
    result=cur.fetchone()
    print result
    print 'ID: %s info %s' % result
 
    results=cur.fetchmany(5)
    for r in results:
        print r
 
    print '=='*10
    cur.scroll(0,mode='absolute')
 
    results=cur.fetchall()
    for r in results:
        print r[1]
     
 
    conn.commit()
    cur.close()
    conn.close()
 
except MySQLdb.Error,e:
     print "Mysql Error %d: %s" % (e.args[0], e.args[1])