Introduction to Sql Azure



  • Microsoft Azure is a cloud computing platform. 
  • It provides the infrastructure to build, deploy and managing applications and services.
  • This is made possible with a global network based data centers managed by Microsoft.
  • The provide services include PaaS and IaaS 
  • SQL Azure extends its support to 
  • Various programming languages, 
  • Microsoft-specific Tools and frameworks and 
  • Third-party based softwares.


Microsoft Azure SQL Database:

  • It is a cloud-based service that offers data-storage facility which is part of Azure Services Platform. 
  • Azure SQL Database permits users to make relational queries against stored data. 
  • The data is stored in the form of structured, semi-structured, or even unstructured documents. 
  • Querying features includes data search, data analysis and data synchronization.

How SQL Azure Works:

  • SQL Database uses a special version of Microsoft SQL Server. 
  • This special version allows storing multiple copies of databases with
  • business continuity,
  • disaster recovery with backups,
  • geo-replication, 
  • elastic scale and 
  • rapid provisioning. 
  • Only a subset of SQL Server functionality is exposed in SQL Azure DB.
  • Data types such as string, numeric, date and Boolean are supported. 
  • XML-based format is implemented for data transfer. 
  • SQL Database uses T-SQL for querying.
  • Tabular Data Stream (TDS) protocol is used to access the service over the Internet.

How to use SQL Azure DB:

  • Organizations can use SQL DB to build applications and transfer them to SQL Azure.
  • The other way is to build applications on Windows Azure and store the data in the cloud. 
  • With Transact-SQL (T-SQL) query language, there is a high rate of fault tolerance.
  • This eases the task of data synchronization as shown below:


Differences in SQL Azure from SQL Server. 

  • Differences in SQL Azure from SQL Server. 
  • SQL Azure doesn’t support all T-SQL commands.
  • SQL Server data types like XML or functions are not supported.
  • Cross-database joins is not permitted.
  • Maximum allowed database size is just 50 GB. 
  • The present release does not perform scheduled backups and restores.