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Python 操作 Mysql 模块的安装
python3.5的mysql模块为pymysql
1 2 3 4 5 | linux： yum install MySQL-pythonwindow： http://files.cnblogs.com/files/wupeiqi/py-mysql-win.zip |
SQL基本使用
1、数据库操作
1 2 3 | show databases;use [databasename];create database [name]; |
2、数据表操作
1 2 3 4 5 6 7 8 9 10 | show tables;create table students ( id int not null auto_increment primary key, name char(8) not null, sex char(4) not null, age tinyint unsigned not null, tel char(13) null default "-" ); |
CREATE TABLE `wb_blog` ( `id` smallint(8) unsigned NOT NULL, `catid` smallint(5) unsigned NOT NULL DEFAULT ‘0‘, `title` varchar(80) NOT NULL DEFAULT ‘‘, `content` text NOT NULL, PRIMARY KEY (`id`), UNIQUE KEY `catename` (`catid`) ) ;
3、数据操作
1 2 3 4 5 6 7 | insert into students(name,sex,age,tel) values(‘alex‘,‘man‘,18,‘151515151‘)delete from students where id =2;update students set name = ‘sb‘ where id =1;select * from students |
4、其他
1 2 3 | 主键外键左右连接 |
Python MySQL API
一、插入数据
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | import MySQLdb conn = MySQLdb.connect(host=‘127.0.0.1‘,user=‘root‘,passwd=‘1234‘,db=‘mydb‘) cur = conn.cursor() reCount = cur.execute(‘insert into UserInfo(Name,Address) values(%s,%s)‘,(‘alex‘,‘usa‘))# reCount = cur.execute(‘insert into UserInfo(Name,Address) values(%(id)s, %(name)s)‘,{‘id‘:12345,‘name‘:‘wupeiqi‘}) conn.commit() cur.close()conn.close() print reCount |
import MySQLdb conn = MySQLdb.connect(host=‘127.0.0.1‘,user=‘root‘,passwd=‘1234‘,db=‘mydb‘) cur = conn.cursor() li =[ (‘alex‘,‘usa‘), (‘sb‘,‘usa‘), ] reCount = cur.executemany(‘insert into UserInfo(Name,Address) values(%s,%s)‘,li) conn.commit() cur.close() conn.close() print reCount
注意：cur.lastrowid
二、删除数据
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | import MySQLdbconn = MySQLdb.connect(host=‘127.0.0.1‘,user=‘root‘,passwd=‘1234‘,db=‘mydb‘)cur = conn.cursor()reCount = cur.execute(‘delete from UserInfo‘)conn.commit()cur.close()conn.close()print reCount |
三、修改数据
1 2 3 4 5 6 7 8 9 10 11 12 13 | import MySQLdbconn = MySQLdb.connect(host=‘127.0.0.1‘,user=‘root‘,passwd=‘1234‘,db=‘mydb‘)cur = conn.cursor()reCount = cur.execute(‘update UserInfo set Name = %s‘,(‘alin‘,))conn.commit()cur.close()conn.close()print reCount |
四、查数据
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | # ############################## fetchone/fetchmany(num) ##############################import MySQLdbconn = MySQLdb.connect(host=‘127.0.0.1‘,user=‘root‘,passwd=‘1234‘,db=‘mydb‘)cur = conn.cursor()reCount = cur.execute(‘select * from UserInfo‘)print cur.fetchone()print cur.fetchone()cur.scroll(-1,mode=‘relative‘)print cur.fetchone()print cur.fetchone()cur.scroll(0,mode=‘absolute‘)print cur.fetchone()print cur.fetchone()cur.close()conn.close()print reCount# ############################## fetchall ##############################import MySQLdbconn = MySQLdb.connect(host=‘127.0.0.1‘,user=‘root‘,passwd=‘1234‘,db=‘mydb‘)#cur = conn.cursor(cursorclass = MySQLdb.cursors.DictCursor)cur = conn.cursor()reCount = cur.execute(‘select Name,Address from UserInfo‘)nRet = cur.fetchall()cur.close()conn.close()print reCountprint nRetfor i in nRet: print i[0],i[1] |
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原文地址：http://www.cnblogs.com/bruceg/p/5288655.html
