如何创建azure Web服务并使用现有的sql数据库

I'm working on an exercise and i want a help. So far I have to created an MVC4 Internet Application using C# and uploaded it to azure as a web site (custom create with sql server). Now I want to create a web service to use the same database that my web application is using. How I can do it? I'm working on an exercise and i want a help. S