第 9 天 python操作mysql数据库

1、插入操作：

#!/uer/bin/env python
# -*- coding:utf-8 -*-

import MySQLdb

conn = MySQLdb.connect(host='192.168.1.100',user='root',passwd='123456',db='oldb')

cur = conn.cursor()

reCount = cur.execute('insert into students(Name,sex,age,tel) values(%s,%s,%s,%s)',('alex2','man',19,'18923143'))
# reCount = cur.execute('select * from students;')

conn.commit()
cur.close()
conn.close()
print(reCount)

输出信息:

3

2、查询操作

#!/uer/bin/env python
# -*- coding:utf-8 -*-

import MySQLdb

conn = MySQLdb.connect(host='192.168.1.100',user='root',passwd='123456',db='oldb')

cur = conn.cursor()

# reCount = cur.execute('insert into students(Name,sex,age,tel) values(%s,%s,%s,%s)',('alex4','man',29,'18923143'))
reCount = cur.execute('select * from students;')


print(cur.fetchone())
----------------------------------
print(cur.fetchall()) #取出所有数据

----------------------------------

print(cur.fetchmany(3)) #指定3 条数据

输出信息:

(1L, 'alex', 'man', 18, '151515151')

------------------------------------

((1L, 'alex', 'man', 18, '151515151')

(2L, 'alex2', 'man', 19, '18923143')

(3L, 'alex2', 'man', 19, '18923143'))

-------------------------------------

()

3、批量插入数据

#!/uer/bin/env python
# -*- coding:utf-8 -*-

import MySQLdb

conn = MySQLdb.connect(host='192.168.1.100',user='root',passwd='123456',db='oldb')

cur = conn.cursor()

li = [
    ('tommite','man',29,'189231432'),
    ('kendi','man',26,'189231433'),
    ('lili','man',19,'189231434'),
]

reCount = cur.executemany('insert into students(Name,sex,age,tel) values(%s,%s,%s,%s)',li)

conn.commit()
cur.close()
conn.close()
print(reCount)

输出信息:

3