Windows Azure上可以提供多种Database As a service。其中SQL database是由微软提供发布并提供支持的。Azure上的SQL database与传统的SQL server的区别在于，Azure提供了原生的数据库高可用（一主两备）、可在数秒内创建新的数据库实例、可快速进行数据库扩
Windows Azure上可以提供多种Database As a service。其中SQL database是由微软提供发布并提供支持的。Azure上的SQL database与传统的SQL server的区别在于，Azure提供了原生的高可用（一主两备）、可在数秒内创建新的实例、可快速进行数据库扩容、支持Federation、提供了全Web化的管理和设计界面、简便的备份恢复等。同时SQL database与已有开发方式和工具基本兼容，应用程序可通过SQL访问数据库，而管理员可以通过SSMS和已有管理工具进行数据库管理。
与此同时，Azure上也提供了Mysql service.该服务是由微软合作伙伴ClearDB提供的。尽管ClearDB也为SQL service提供了高可用性和快速部署的特性，但管理功能较为薄弱。Mysql service不具备Web化的管理界面，只能通过SQL命令进行操作。对于已有Mysql用户来说，把数据库迁移到SQL database上也许是个不错的选择。
要进行Mysql到SQL database的迁移，可以采用SQL server migration assistant to Mysql (SSMA)工具，该工具可以从这里。同时，该工具需要使用Mysql for ODBC driver，可以从 下载
首次运行SSMA，需要导入license。该工具是一个免费工具，可以在license对话框上点击链接进行license的申请和下载
之后就可以启动SSMA了
要进行迁移，首先要建立一个项目。点击File->New Project. 注意在Migrate to里面选择SQL Azure
然后在Connect to mysql里面输入已有Mysql数据库的连接信息。
接着点击connect to SQL Azure，输入SQL database 的连接信息。如果尚未创建SQL database，可以按照下面的步骤创建一个。
1. 首先要有Azure账号。然后在管理界面里面New->Data services->SQL database->custom create
2. 输入数据库名/大小。要注意这个大小要比Mysql源数据库大。选择新建一个server，输入用户名和密码
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