python连接数据库并插入数据

1.Python创建数据库

import MySQLdb
try:
    conn = MySQLdb.connect(
        host="127.0.0.1",
        port=3306,
        user="root",
        passwd="",
       # db="juntest",#也可以在这一步显示数据库名
        charset="utf8")
    cur = conn.cursor()
    cur.execute('CREATE DATABASE IF NOT EXISTS juntestDBnew DEFAULT CHARSET utf8 COLLATE utf8_general_ci;')  #没有这个表，就创建
    conn.close()
    print u"创建数据库juntestDBnew成功! "
except MySQLdb.Error, e:
    print "Mysql Error %d: %s" % (e.args[0], e.args[1])

创建成功，查看

2.创建数据表

#coding=utf-8
import MySQLdb
try:
    conn = MySQLdb.connect(
        host="127.0.0.1",
        port=3306,
        user="root",
        passwd="",
       # db="juntest",另外写一种建表的方法
        charset="utf8")
    conn.select_db('juntestDBnew')#选择一个数据库
    cur = conn.cursor()
    cur.execute("drop table if exists emp_info2;")
    cur.execute("drop table if exists salary2;")
    cur.execute('''create table emp_info2(
id int not null auto_increment,
name varchar(30) not null,
sex char(4) default null,
dept varchar(10),
mobile varchar(11) not null unique,
birthday date default "0000-00-00",
primary key(id)
)engine=innodb character set utf8 comment 'employer info';
 ''')
    cur.execute('''create table salary2(
id int not null auto_increment,
emp_id int not null,
salary int not null,
primary key(id)
)engine=innodb character set utf8 comment 'employer salary info';
   ''')
    cur.close()
    conn.close()
    print u"创建数据表成功! "

except MySQLdb.Error, e:
     print "Mysql Error %d: %s" % (e.args[0], e.args[1])

查看是否成功

3.进行数据的插入

#coding=utf-8
import MySQLdb
import random

try:
    conn = MySQLdb.connect(
        host="127.0.0.1",
        port=3306,
        user="root",
        passwd="",
        db="juntestDBnew",#另外写一种建表的方法
        charset="utf8"
    )
    cur=conn.cursor()
    num=random.randint(10,300)
    sql="insert into emp_info2 values(%s,%s,%s,%s,%s,%s)"#这种写法自增字段和隐藏字段都要写出来
    #cur.execute(sql, (4, 'jun1', 'm', 'jun', '12345', '2017-4-30'));
    for i in  range(1,10):
        cur.execute('delete from emp_info2 where id='+str(i));
        #第一种插入
        cur.execute(sql, (i, 'jun'+str(i), 'm', 'jun', ''+str(random.randint(1,1000)), '2017-4-'+str(random.randint(1,30))));
        print u"插入第(%s)条数据成功"%i
    cur.close()
    conn.commit()
    conn.close()

except MySQLdb.Error, e:
     print "Mysql Error %d: %s" % (e.args[0], e.args[1])