MySQL Connector/Python

       MySQL Connector/Python 是 MySQL 官方提供的 Python 连接 MySQL 数据库的驱动程序.下载地址为： http://www.mysql.com/downloads/connector/python/，到现在位置发布支持Python2.7，Python3.2的版本，Python3.3的版本正在开发中，支持Python3.*的连接驱动真是太少，而且论坛的Pythoner们动不动就是建议用2.7，这可以说是个极坏的现象。
       在此介绍基本操作，如果有点E文基础，也可看官方文档 http://dev.mysql.com/doc/refman/5.6/en/connector-python.html

1.连接数据库

import mysql.connector
config={'host':'127.0.0.1',#默认127.0.0.1
        'user':'root',
        'password':'123456',
        'port':3306 ,#默认即为3306
        'database':'test',
        'charset':'utf8'#默认即为utf8
        }
try:
  cnn=mysql.connector.connect(**config)
except mysql.connector.Error as e:
  print('connect fails!{}'.format(e))

2.执行建表语句，我们将建下面样式的表

sql_create_table='CREATE TABLE `student` \
(`id` int(10) NOT NULL AUTO_INCREMENT,\
`name` varchar(10) DEFAULT NULL,\
`age` int(3) DEFAULT NULL,\
PRIMARY KEY (`id`)) \
ENGINE=MyISAM DEFAULT CHARSET=utf8'
cursor=cnn.cursor()
try:
  cursor.execute(sql_create_table)
except mysql.connector.Error as e:
  print('create table orange fails!{}'.format(e))

3.插入操作

cursor=cnn.cursor()
try:
  '第一种：直接字符串插入方式'
  sql_insert1="insert into student (name, age) values ('orange', 20)"
  cursor.execute(sql_insert1)
  '第二种：元组连接插入方式'
  sql_insert2="insert into student (name, age) values (%s, %s)"
  #此处的%s为占位符，而不是格式化字符串，所以age用%s
  data=('shiki',25)
  cursor.execute(sql_insert2,data)
  '第三种：字典连接插入方式'
  sql_insert3="insert into student (name, age) values (%(name)s, %(age)s)"
  data={'name':'mumu','age':30}
  cursor.execute(sql_insert3,data)
  #如果数据库引擎为Innodb，执行完成后需执行cnn.commit()进行事务提交
except mysql.connector.Error as e:
  print('insert datas error!{}'.format(e))
finally:
  cursor.close()
  cnn.close()

还可以多次插入，提高效率

stmt='insert into student (name, age) values (%s,%s)'
data=[
     ('Lucy',21),
     ('Tom',22),
     ('Lily',21)]
cursor.executemany(stmt,data)

4.查询操作

cursor=cnn.cursor()
try:
  sql_query='select id,name from student where  age > %s'
  cursor.execute(sql_query,(21,))
  for id,name in cursor:
    print ('%s\'s age is older than 25,and her/his id is %d'%(name,id))
except mysql.connector.Error as e:
  print('query error!{}'.format(e))
finally:
  cursor.close()
  cnn.close()

5.删除操作

cursor=cnn.cursor()
try:
  sql_delete='delete from student where name = %(name)s and age < %(age)s'
  data={'name':'orange','age':24}
  cursor.execute(sql_delete,data)
except mysql.connector.Error as e:
  print('delete error!{}'.format(e))
finally:
  cursor.close()
  cnn.close()