python连接mysql数据库
1.系统必须安装MySQL-python软件，否则python没有连接的模块(在Linux系统)
yum install MySQL-python
2.安装mysql数据库
yum install mysql-server mysql
[root@AY140528120357495c4bZ ~]# /etc/init.d/mysqld restart
Stopping mysqld: [ OK ]
Starting mysqld: [ OK ]
[root@AY140528120357495c4bZ ~]#
3.在mysql中创建数据库和表
[root@AY140528120357495c4bZ ~]# mysql -u root -p
Enter password:
mysql: Unknown OS character set 'GB18030'.
mysql: Switching to the default character set 'latin1'.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 474
Server version: 5.6.11 Source distribution
Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> create database tong; --创建数据库
Query OK, 1 row affected (0.00 sec)
mysql> \u tong
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> create table t(a int); --创建表
Query OK, 0 rows affected (0.06 sec)
mysql>
4.用python语言插入数据和查询数据
vim 1.py
import os,sys
import MySQLdb
try:
conn=MySQLdb.connect(host="localhost",user="root",passwd="archermind",db="tong") --输出数据库的用户名,密码,数据库名
except Exception,e:
print(e)
sys.exit()
cursor=conn.cursor()
sql1="insert into t values(1),(2)" --要执行的sql语句
sql2="commit" --sql语句执行后必须提交事物
try:
cursor.execute(sql1) --执行sql语句
cursor.execute(sql2)
except Exception,e:
print(e)
sql3="select * from t" --查询数据
cursor.execute(sql3) --执行查询的语句
row=cursor.fetchall()
if row:
for x in row:
print(x[0]) --把值输出到屏幕上
cursor.close()
conn.close()
5.执行python程序,测试是否成功
[root@AY140528120357495c4bZ script]# python 8.py --验证成功
1
2
[root@AY140528120357495c4bZ script]# mysql -u root -p tong
Enter password:
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 522
Server version: 5.6.11 Source distribution
Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> select * from t; --数据库里也有数据
+------+
| a |
+------+
| 1 |
| 2 |
+------+
2 rows in set (0.00 sec)
mysql>