简介:
微软azure平台推出sqldatabase paas服务。现在使用python语言连接azure数据库的小demo。
准备环境:
1,azure sqldatebase数据库创建,参考http://www.windowsazure.cn/starter-guide/
第三课,创建云端的数据库,
2,创建demo表,我是使用管理工具创建,sql语句代码为:
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[demo1]') AND type in (N'U')) BEGIN CREATE TABLE [dbo].[demo1]( id [int] IDENTITY(1,1) NOT NULL, name varchar(30) not null CONSTRAINT [PK_demo] PRIMARY KEY CLUSTERED ( [id] ASC )WITH (IGNORE_DUP_KEY = OFF) ) END; GO
需要注意的事项为:sqldatabase必须有一列为聚合键,如果没有,创建表会失败,临时表没有该限制。
可以参考http://azure.microsoft.com/en-us/documentation/articles/data-management-azure-sql-database-and-sql-server-iaas/
3,1台azure linux虚拟机,我使用的ubuntu14.04 LTS
4,1个csv文件,只包含1列中文
开始动手
1,安装包python,pyodbc,unixodbc,freetds-bin
2,开始配置,
(1)配置freetds.conf,常见位置/etc/freetds,/usr/local/etc/
# server specific section [global] # TDS protocol version tds version = 7.2 client charset = UTF-8 # Whether to write a TDSDUMP file for diagnostic purposes # (setting this to /tmp is insecure on a multi-user system) ; dump file = /tmp/freetds.log ; debug flags = 0xffff # Command and connection timeouts ; timeout = 10 ; connect timeout = 10 # If you get out-of-memory errors, it may mean that your client # is trying to allocate a huge buffer for a TEXT field. # Try setting 'text size' to a more reasonable limit text size = 64512 [azure] host = hostname.database.chinacloudapi.cn port = 1433 tds version = 7.2
其中,tds version选择了7.2,添加了client charset,这是为了防止中文乱码
(2)配置odbcinst.ini位置在/etc
[FreeTDS] Description = FreeTDS Driver Driver = /usr/lib/x86_64-linux-gnu/odbc/libtdsodbc.so Setup = /usr/lib/x86_64-linux-gnu/odbc/libtdsS.so UsageCount = 1
(3)配置odbc.ini位置在/etc
[azure_odbc] Driver = FreeTDS Servername = azure Database = azureea
其中azure_odbc为odbc的dsn,Servername为freetds配置节点,Driver为odbcinst的配置节点,Database为azure数据库名称
3,开始调试,调试的python代码为:
#coding:utf-8 #!/usr/bin/env python import pyodbc import csv from datetime import datetime conn = pyodbc.connect('DSN=azure_odbc;UID=username@host;PWD=xxxxx;CHARSET=utf8;') cursor = conn.cursor() csvfile=file('name.csv','rb') reader=csv.reader(csvfile) for line in reader: print line[0] name=line[0] cursor.execute("insert into demo1(name) values (?);",name) conn.commit() conn.close() csvfile.close()
到此,一个采集数据的小案例就完成了。