Azure SQL Database

Managed, intelligent SQL in the cloud

The best destination for fully managed SQL in the cloud

Azure SQL Database is the intelligent, scalable, cloud database service that provides the broadest SQL Server engine compatibility and up to a 212% return on investment. Migrate existing apps or build new apps on Azure - the best cloud destination for your mission-critical SQL Server workloads.

Azure SQL Database is now Azure Arc-enabled. You can run this service on premises on infrastructure of your choice with cloud benefits like automation, no end of support, unified management, and a cloud billing model.

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Frictionless database migration with no code changes at an industry leading TCO

Built-in machine learning for peak database performance and durability that optimizes performance and security for you

Unmatched scale and high availability for compute and storage without sacrificing performance

Advanced data security including data discovery and classification, vulnerability assessment, and advanced threat detection all in a single pane of glass

Frictionless migration

Accelerate your on-premises SQL Server migrations without changing the application code with Managed Instance. Always have the latest SQL Server capabilities in the cloud with an evergreen SQL database that requires no patching or upgrading from you. Use the Azure Hybrid Benefit for industry leading TCO.

Enjoy additional deployment flexibility with Single Database for SQL applications created in the cloud, or Elastic Pool for multi-tenant applications.

Read the Azure Database Migration Guide

Built-in machine learning

Get peak database performance and durability with safe, reliable, and proven AI technology. Maximize the performance of your application with customized auto-tuning recommendations. Use Intelligent Insights to monitor and detect disruptive events that can cause poor performance.

Learn more about machine learning-based monitoring and tuning

Unmatched scale and high availability

Scale your application on demand with up to 99.995 percent availability. Take advantage of Hyperscale, with support for up to 100TB, and restore massive databases in just minutes. Scale compute and storage resources independently for maximum flexibility and lower your costs with discounted readable replicas. Built-in high availability in Azure SQL Database guarantees that the database will never be the single point of failure in your software architecture. Optimize price-performance for databases with intermittent and unpredictable usage patterns with the serverless compute tier.

Learn more about scalability and availability.

Advanced data security

  • Protect your databases from malicious acts with fine-grained access controls, Always Encrypted technology, and advanced threat protection capabilities.
  • Discover, track and remediate potential vulnerabilities from a single screen.
  • Azure SQL Database meets the most stringent compliance standards with built-in auditing and information protection technology.
  • Get continuous protection with deeper insights from Azure Security Center.
  • Multi-layered security provided by Microsoft across physical datacenters, infrastructure, and operations.

Pricing for the intelligent, relational cloud database service

Azure SQL Database is a fully managed relational database with built-in intelligence supporting self-driving features such as performance tuning and threat alerts. Explore all SQL Database pricing options and find the performance that fits your workload.

Visit the SQL DB pricing page

Trusted by companies of all sizes

Removing the bottlenecks to business growth

Learn how Paychex migrated to Azure SQL Database to handle their explosive growth. Using elastic pools, Paychex can deliver the app at scale with high performance and availability, while optimizing their costs.

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Achieve breakthrough performance and savings

Learn how Komatsu Australia reduced costs by 49 percent and increased performance up to 30 percent by migrating their data to SQL Database Managed Instance.

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Migrating to Azure unlocks savings and time-to-market gains

Allscripts realized dramatic time-to-market gains and savings by migrating their applications to SQL Database Managed Instance and Azure infrastructure as a service (IaaS) offerings.

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Migrate large workloads without extensive downtime or code changes

Learn how KMD, part of NEC corporation, migrated an 8 terabyte production database to Azure SQL Database Managed Instance, quickly and without service interruption.

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Improve productivity with smarter services

Find out how enterprise software developer ABB uses Azure platform as a service (PaaS) offerings including Azure SQL Database to drive product development using a microservices-based architecture.

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ABB Group

Predicting weather with cloud-based machine learning

AccuWeather uses machine learning to provide minute-by-minute updates to help defend people and businesses against the weather.

Read the story


Everything you need to get started easy

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Discover how to use SQL Database: explore tutorials, API references, code samples, and other documentation.

Deploy SQL Database using quickstart resources
made by the Azure community.

Documentation, training and migration resources

Updates, blogs, and announcements

  • Azure SQL Database provides the following deployment options for an Azure SQL database

    • As a single database with its own set of resources managed via a logical server
    • As a pooled database in an elastic pool with a shared set of resources managed through a logical server
    • As a part of a managed instance, which is a collection of databases that contains system and user databases and shares a set of resources

    In general, elastic pools are designed for a typical software-as-a-service (SaaS) application pattern, where there is one database per customer or tenant. Purchasing individual databases and over-provisioning to meet the variable and peak demand for each database is often not cost efficient, but with pools, you manage the collective performance and the databases scale up and down automatically. Azure's intelligent engine recommends a pool for databases when a usage pattern warrants it. For details, see Elastic pool guidance.

    SQL Database Managed Instance is an expansion of the existing SQL Database resource types, combining the best of SQL Server with all the benefits of a fully-managed (platform as a service) PaaS, minimizing or eliminating the need to re-design the application. SQL Database Managed Instance uniquely offers instance-level compatibility for SQL Server features such as SQL Agent, Service Broker, Linked Server, and cross-database queries, enabling new migration scenarios where application changes are significantly reduced or eliminated.

  • Azure Hybrid Benefit for SQL Server helps you maximize the value from your current licensing investments and accelerate their migration to the cloud. Azure Hybrid Benefit for SQL Server is an Azure-based benefit that enables you to use your SQL Server licenses with Software Assurance to pay a reduced rate (“base rate”) on SQL Database. Azure Hybrid Benefit for SQL Server is available for vCore-based databases, pools and instances. You may apply this benefit even if the SKU is already active, but please note that the base rate is applied from the time you select it in the Azure portal. No credit will be issued retroactively.

  • No, Azure SQL Database is a fully managed database service, which means that Microsoft operates SQL Server for you and ensures its availability and performance. SQL Database also includes innovative features to enhance your security and business continuity. For example, built-in high availability. A comprehensive security portfolio allows you to implement intelligent features like threat detection, so that don’t have to worry about administering or maintaining hundreds or thousands of your SQL Server databases.

    View the full feature comparison between Azure SQL Database vs. SQL Server.

  • This new purchasing model is an addition to the existing DTU-based model. The vCore-based model is designed to give you flexibility, control, transparency, and a straightforward way to translate on-premises workload requirements to the cloud. It also allows you to scale your compute and storage resources based on your workload needs. Single database and elastic pool options using the vCore model are also eligible for up to 55 percent savings with Azure Hybrid Benefit for SQL Server. See the vCore-based purchasing model for more information.

  • The vCore-based service tiers are primarily differentiated by availability, storage type, and IOPS.

    • General Purpose offers budget-oriented balanced set of compute and storage options where IO performance or failover time is not the priority.
    • Hyperscale is appropriate for most business workloads, optimized for OLTP and hybrid transactional analytical workloads (HTAP), with highly scalable storage size, read scale-out, and fast database restore capabilities.
    • Business Critical is best for OLTP applications with high transaction rate and low IO latency. It offers highest resilience to failures and fast failovers by using multiple synchronously updated replicas.
  • Connectivity between your Microsoft Azure SQL Database and the Azure Internet gateway is guaranteed at least 99.99 percent of the time, regardless of your service tier. 0.01% is reserved for patches, upgrades, and failovers. For more information, read the SLA. For information about the availability architecture of Azure SQL Database, see High Availability and Azure SQL Database.

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1Price-performance claim based on data from a study commissioned by Microsoft and conducted by GigaOm in August 2019. The study compared price-performance between a single, 80 vCore, Gen 5 Azure SQL Database on the business critical service tier and the db.r4.16x large offering for Amazon Web Services Relational Database Service (AWS RDS) for SQL Server. Benchmark data is taken from a GigaOm Analytic Field Test derived from a recognized industry standard, TPC Benchmark™ E (TPC-E), and is based on a mixture of read-only and update intensive transactions that simulate activities found in complex OLTP application environments. Price-performance is calculated by GigaOm as the cost of running the cloud platform continuously for three years divided by transactions per second throughput. Prices are based on publicly available US pricing in East US for Azure SQL Database and US East (Ohio) for AWS RDS as of August 2019. Price-performance results are based upon the configurations detailed in the GigaOm Analytic Field Test. Actual results and prices may vary based on configuration and region.