python下使用mysql.connector 安装以及连接数据库的操作

1.ubuntn下mysql.connector模块的安装

sudo-apt-get install mysql.connector

2.数据库的连接

config={

'host':'127.0.0.1',#默认127.0.0.1

'user':'root',

'password':'ict',

'port':3306 ,#默认即为3306

'database':'tianyi',

'charset':'utf8'#默认即为utf8

}

try:

cnn=mysql.connector.connect(**config)

if cnn:

print 'ok'

except mysql.connector.Error as e:

print('connect fails!{}'.format(e))

3、插入数据

cursor=cnn.cursor()

try:

'第一种：直接字符串插入方式'

sql_insert1="insert into student (name, age) values ('orange', 20)"

cursor.execute(sql_insert1)

'第二种：元组连接插入方式'

sql_insert2="insert into student (name, age) values (%s, %s)"

#此处的%s为占位符，而不是格式化字符串，所以age用%s

data=('shiki',25)

cursor.execute(sql_insert2,data)

'第三种：字典连接插入方式'

sql_insert3="insert into student (name, age) values (%(name)s, %(age)s)"

data={'name':'mumu','age':30}

cursor.execute(sql_insert3,data)

#如果数据库引擎为Innodb，执行完成后需执行cnn.commit()进行事务提交

except mysql.connector.Error as e:

print('insert datas error!{}'.format(e))

finally:

cursor.close()

cnn.close()

同样，MySQL Connector也支持批量插入，同样其使用的也是cursor.executemany，示例如下：

stmt='insert into student (name, age) values (%s,%s)'

data=[

('Lucy',21),

('Tom',22),

('Lily',21)]

cursor.executemany(stmt,data)

4、查询操作

cursor=cnn.cursor()

try:

sql_query='select id,name from student where age > %s'

cursor.execute(sql_query,(21,))

for id,name in cursor:

print ('%s＼'s age is older than 25,and her/his id is %d'%(name,id))

except mysql.connector.Error as e:

print('query error!{}'.format(e))

finally:

cursor.close()

cnn.close()

5、删除操作

cursor=cnn.cursor()

try:

sql_delete='delete from student where name = %(name)s and age < %(age)s'

data={'name':'orange','age':24}

cursor.execute(sql_delete,data)

except mysql.connector.Error as e:

print('delete error!{}'.format(e))

finally:

cursor.close()

cnn.close()