python 之mysql（多条数据插入，获取多条数据fetchone（）or fetchall()）

#!/usr/bin/env python

#coding:utf-8

import MySQLdb

'''

#打开数据库链接

conn = MySQLdb.connect(host='127.0.0.1',user='root',passwd='1234',db='07day05db')

# 使用cursor()方法获取操作游标

cur = conn.cursor()

# 使用execute方法执行SQL语句

reCount = cur.execute('insert into UserInfo(Name,Address) values(%s,%s)',('alex','usa'))

# 提交到数据库执行

conn.commit()

cur.close()

conn.close()

print reCount

'''

'''

conn = MySQLdb.connect(host='127.0.0.1',user='root',passwd='1234',db='07day05db')

cur = conn.cursor()

reCount = cur.execute('delete from UserInfo')

conn.commit()

cur.close()

conn.close()

print reCount

'''

'''

conn = MySQLdb.connect(host='127.0.0.1',user='root',passwd='1234',db='07day05db')

cur = conn.cursor()

#插入多条数据数据库

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

'''

'''

conn = MySQLdb.connect(host='127.0.0.1',user='root',passwd='1234',db='07day05db')

cur = conn.cursor()

reCount = cur.execute('update UserInfo set Name = %s',('alin',))

conn.commit()

cur.close()

conn.close()

print reCount

'''

'''

#fetchone/fetchmany(num) 

conn = MySQLdb.connect(host='127.0.0.1',user='root',passwd='1234',db='07day05db')

cur = conn.cursor()

reCount = cur.execute('select * from UserInfo')

print cur.fetchone()

print cur.fetchone()

#绝对定位

cur.scroll(-1,mode='absolute')

#相对定位

cur.scroll(-1,mode='relative')

print cur.fetchone()

print cur.fetchone()

cur.scroll(0,mode='absolute')

# 使用 fetchone() 方法获取一条数据

print cur.fetchone()

print cur.fetchone()

cur.close()

conn.close()

print reCount

'''

Python查询Mysql使用 fetchone() 方法获取单条数据, 使用fetchall() 方法获取多条数据。

fetchone(): 该方法获取下一个查询结果集。结果集是一个对象

fetchall():接收全部的返回结果行.

rowcount: 这是一个只读属性，并返回执行execute()方法后影响的行数。

#fetchall

conn = MySQLdb.connect(host='127.0.0.1',user='root',passwd='1234',db='07day05db')

#以字典的方式填充结果cur = conn.cursor(cursorclass = MySQLdb.cursors.DictCursor)

#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 reCount

print nRet

for i in nRet:

    print i[0],i[1]