Does Sql Azure charge by database or database server

I've currently got a "Web" edition SQL Azure se开发者_如何学Crver with on database on it. I want to put another database on there but am unsure how the costing works. Will I need to pay the £9.99 per database or database server?

Does it make more sense just to set up a couple of different schemas in my existing database to try and reduce costs?

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You pay per database. Creating schemas may make sense if cost is your concern. I have seen this done multiple times. However keep in mind that a few SQL Server/Azure features are schema independent. For example user-defined statistics and roles are schema independent. So as long as you don't use these features you should be good with a schema-based separation.