I have files which are saved in Azure Blob storage, and i have a database which keeps URIs of those files. Is there any standart way to sync them? I mean that there should be no way to delete file without deleting record in the database and vise versa.
There is no out of the box way of doing this, so you need to write your own. I found this file monitor example useful: http://ben.onfabrik.com/posts/monitoring-files-in-azure-blob-storage
2022 Update As pointed out in comments, in the decade since this answer was posted, the link has gone dead. The wayback machine has it here: https://web.archive.org/web/20130629015900/http://ben.onfabrik.com/posts/monitoring-files-in-azure-blob-storage
Given the many changes to Azure since 2012, it is highly doubtful that this is still the best way to solve this problem.