Azure SQL Database enables you to easily scale you database by adding more compute power (scale-up) or adding more database units (scale-out).
Easily add or remove resources in your SQL Database in order to find the best price/performance ratio or mitigate performance issues.
Business Critical tier provides you a free-of-charge replica of database where you can run reports, analytics, and other read-only queries on a copy of data.
You can use multiple databases shards to scale-out your database beyond maximal compute and storage limits for single databases.
Elastic Queries enable you run standard Transact-SQL queries on a set of globally-distributed database shards.
Use globally distributed transactions to ensure transactionally consistent access to your distributed data.
Cross database jobs
Maintain a set of databases using Cross database Elastic Jobs.
Learn about additional features that can help you to scale your data.