I think many have covered how you should backup your SQL Server database to Azure storage (also known as backup to URL) but what about restoring? Lets assume you have setup backups and they are working, this is what I usually do.

First, I issue the following command to get a general understanding of the configuration settings applied to a database (this was done via managed backups feature).

USE msdb
GO
SELECT * FROM managed_backup.fn_backup_db_config ('yourdb')

Great, the next code block is about getting a list of the backups that are located within my storage container.

USE msdb
SELECT *
FROM managed_backup.fn_available_backups ('yourdb') 

From here you can build a chain for your restore point.

what will your code look like?

 USE [master]

RESTORE DATABASE [TestDBCopy]
 FROM  URL =
  N'https://yourcontainer.blob.core.windows.net/backupcontainer/TestDBfull.bak'
   WITH  FILE = 1,  MOVE N'TestDB' TO N'L:\Data\TestDBcopy.mdf',  MOVE N'TestDB_log' TO N'L:\Log\TestDB_logcopy.ldf',
    NORECOVERY,  NOUNLOAD,  STATS = 5

RESTORE LOG [TestDBCopy]
FROM  URL = N'https://yourcontainer.blob.core.windows.net/backupcontainer/TestDBtrans1.log'
 WITH  FILE = 1,  NORECOVERY,  NOUNLOAD,  STATS = 5

RESTORE LOG [TestDBCopy] FROM  URL
= N'https://yourcontainer.blob.core.windows.net/backupcontainer/TestDBtrans2.log'
 WITH  FILE = 1,  RECOVERY,  NOUNLOAD,  STATS = 5

It is similar to what you are used to, such as the FROM DISK commands. The only extra steps you need is the SAS, secret and credential setup, which you obviously have already if you have successfully setup the backups in the first place.