fnngj@fnngj-H24X:~/pyse$ python
Python 2.7.4 (default, Sep 26 2013, 03:20:56)
[GCC 4.7.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import MySQLdb

mysql> show databases;  // 查看当前所有的数据库
+--------------------+
| Database           |
+--------------------+
| information_schema |
| csvt               |
| csvt04             |
| mysql              |
| performance_schema |
| test               |
+--------------------+
6 rows in set (0.18 sec)mysql> use test;   //作用与test数据库
Database changed
mysql> show tables;   //查看test库下面的表
Empty set (0.00 sec)//创建user表，name 和password 两个字段
mysql> CREATE  TABLE  user (name VARCHAR(20),password VARCHAR(20));  Query OK, 0 rows affected (0.27 sec)//向user表内插入若干条数据
mysql> insert into user values('Tom','1321');
Query OK, 1 row affected (0.05 sec)mysql> insert into user values('Alen','7875');
Query OK, 1 row affected (0.08 sec)mysql> insert into user values('Jack','7455');
Query OK, 1 row affected (0.04 sec)//查看user表的数据
mysql> select * from user;
+------+----------+
| name | password |
+------+----------+
| Tom  | 1321     |
| Alen | 7875     |
| Jack | 7455     |
+------+----------+
3 rows in set (0.01 sec)//删除name 等于Jack的数据
mysql> delete from user where name = 'Jack';
Query OK, 1 rows affected (0.06 sec)//修改name等于Alen 的password 为 1111
mysql> update user set password='1111' where name = 'Alen';
Query OK, 1 row affected (0.05 sec)
Rows matched: 1  Changed: 1  Warnings: 0//查看表内容
mysql> select * from user;
+--------+----------+
| name   | password |
+--------+----------+
| Tom    | 1321     |
| Alen   | 1111     |
+--------+----------+
3 rows in set (0.00 sec)

#coding=utf-8
import MySQLdbconn= MySQLdb.connect(host='localhost',port = 3306,user='root',passwd='123456',db ='test',)
cur = conn.cursor()#创建数据表
#cur.execute("create table student(id int ,name varchar(20),class varchar(30),age varchar(10))")#插入一条数据
#cur.execute("insert into student values('2','Tom','3 year 2 class','9')")#修改查询条件的数据
#cur.execute("update student set class='3 year 1 class' where name = 'Tom'")#删除查询条件的数据
#cur.execute("delete from student where age='9'")cur.close()
conn.commit()
conn.close()

#coding=utf-8
import MySQLdbconn= MySQLdb.connect(host='localhost',port = 3306,user='root',passwd='123456',db ='test',)
cur = conn.cursor()#插入一条数据
sqli="insert into student values(%s,%s,%s,%s)"
cur.execute(sqli,('3','Huhu','2 year 1 class','7'))cur.close()
conn.commit()
conn.close()

#coding=utf-8
import MySQLdbconn= MySQLdb.connect(host='localhost',port = 3306,user='root',passwd='123456',db ='test',)
cur = conn.cursor()#一次插入多条记录
sqli="insert into student values(%s,%s,%s,%s)"
cur.executemany(sqli,[('3','Tom','1 year 1 class','6'),('3','Jack','2 year 1 class','7'),('3','Yaheng','2 year 2 class','7'),])cur.close()
conn.commit()
conn.close()

>>> import MySQLdb
>>> conn = MySQLdb.connect(host='localhost',port = 3306,user='root',    passwd='123456',db ='test',)
>>> cur = conn.cursor()
>>> cur.execute("select * from student")
5L
>>> cur.fetchone()
(1L, 'Alen', '1 year 2 class', '6')
>>> cur.fetchone()
(3L, 'Huhu', '2 year 1 class', '7')
>>> cur.fetchone()
(3L, 'Tom', '1 year 1 class', '6')
...
>>>cur.scroll(0,'absolute') 

#coding=utf-8
import MySQLdbconn= MySQLdb.connect(host='localhost',port = 3306,user='root',passwd='123456',db ='test',)
cur = conn.cursor()#获得表中有多少条数据
aa=cur.execute("select * from student")
print aa#打印表中的多少数据
info = cur.fetchmany(aa)
for ii in info:print ii
cur.close()
conn.commit()
conn.close()

5
(1L, 'Alen', '1 year 2 class', '6')
(3L, 'Huhu', '2 year 1 class', '7')
(3L, 'Tom', '1 year 1 class', '6')
(3L, 'Jack', '2 year 1 class', '7')
(3L, 'Yaheng', '2 year 2 class', '7')
[Finished in 0.1s]