Python developmenttorndb

Torndb module

　Summary: torndb is a lightweight module based on MySQLdb encapsulation. Is part of the tornadoframework. Its project homepage is: https://github.com/bdarnell/torndb. Since tornado version 3.0, it has been released as an independent module. You can install directly through easy_install or pip.

1, Connect to the database

##

# 创建连接
import torndb
# 数据库、账号、密码、时区
db = torndb.Connection("192.168.1.134:3306",'Jefrey',user='lzl',password='123456',time_zone='+8:00')

Supplement:

• Default Character setUTF8, there is no need to add charset = "utf8"

• Also note that the default time zone is time_zone='+0:00'

• This can be manually specified as East 8 District when connecting

2 ,Create data table

# 创建
create='create table blog(id int,content text)'
db.execute(create)

##3、Insert data

#①

、execute

# 插入execute
# execute='insert into blog(id,content)values(%d,"%s")'%(7,'Jefrey5')
# db.execute(execute)

②

、insert##

# 单条insert
insert =  'insert into blog(id,content)values(%s,%s)'
db.insert(insert,10,'Jefrey10')

③

、insertmany

# insertmany
insertmany =  'insert into blog(id,content)values(%s,%s)'
db.insertmany(insert,[[11,'Jefrey11'],[12,'Jefrey12']])

　

4,

query

data①

、query query

# Query查询
sql = &#39;SELECT * FROM blog WHERE content = %s AND id < %s&#39;
# 查询到一条数据时为列表
database = db.query(sql, &#39;Jefrey&#39;, 11)
# [{&#39;content&#39;: u&#39;Jefrey&#39;, &#39;id&#39;: 1L}]

# 查询到多条数据为也为列表
database5 = db.query(sql, &#39;Jefrey5&#39;, 11)
# [{&#39;content&#39;: u&#39;Jefrey5&#39;, &#39;id&#39;: 5L}, {&#39;content&#39;: u&#39;Jefrey5&#39;, &#39;id&#39;: 8L}, {&#39;content&#39;: u&#39;Jefrey5&#39;, &#39;id&#39;: 7L}]

# 查询数据不存在时为空列表
database10 = db.query(sql, &#39;Jefrey10&#39;, 11)
# []

##②
、get query

# Get查询
sql = &#39;SELECT * FROM blog WHERE content = %s AND id < %s&#39;
# 查询到一条数据时为字典
database = db.get(sql, &#39;Jefrey&#39;, 11)
# {&#39;content&#39;: u&#39;Jefrey&#39;, &#39;id&#39;: 1L}

# 查询到多条数据时报错
database5 = db.get(sql, &#39;Jefrey5&#39;, 11)
# Exception: Multiple rows returned for Database.get() query

# 查询数据不存在时为None
database10 = db.get(sql, &#39;Jefrey10&#39;, 11)
# None

　

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