How to check Edition and Max Size of SQL Azure Database trough T-SQL query

Its very often requierd to check what's the edition (Web, Business) and maximum size (1GB, 5GB, 10GB, 20GB, 30GB, 40GB, 50GB) of a SQL Azure database.  There are two ways to do this.

1. Check the database properties in the Azure portal https://windows.azure.com/
2. Run a T-SQL query against your database

I find the latter approach quite handy. Here's the query:

SELECT DATABASEPROPERTYEX('Database_Name', 'EDITION')

SELECT DATABASEPROPERTYEX('Database_Name', 'MaxSizeInBytes')
OR
SELECT CONVERT(BIGINT,DATABASEPROPERTYEX ( 'Database_Name' , 'MAXSIZEINBYTES'))/1024/1024/1024 AS 'MAXSIZE IN GB'

Remember that it needs to be executed on the database you want to check, not on the master database. Then you might ask why the database_name is required? I don't know! :)

Here's the full list of properties supported in this function: http://msdn.microsoft.com/en-us/library/ee621786.aspx