Question

Does anyone knows how data is beeing retrived from table storage?

var result = ctx.CreateQuery<Contact>("Contacts")
                    .Where(x => x.PartitionKey == "key")
                    .Take(50)
                    .AsTableServiceQuery<Contact>().Execute();
foreach(var item in result)
{
    Console.WriteLine(item.FirstName);
}

Does it get all items from storage and than loops through them or it get each item separately?

Answer 1

Take a look at the following links.

This one talks about the basics of table storage –
http://msdn.microsoft.com/en-us/magazine/ff796231.aspx

This one covers more than you are asking about, but there are some How To code examples that might be useful for querying table storage – http://www.windowsazure.com/en-us/develop/net/how-to-guides/table-services/

I also recommend this video from the PDC. It’s a deep dive into tables and queues in Azure. – http://www.microsoftpdc.com/2009/svc09