.EDMX File in asp.net

Hi all,

I need help once again in using .edmx file(Entity Model) with asp.net website.

I need to access database using WCF Service.

I have done the following-
1)added a new .edmx file,
2)completed with sql server connection,
3)Added a new WCF Service File(.svc)
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Now, how to move further??

Where do I write my SQL Queries?

Please help me out.