Azure SQL Database
Relational databases
Database as a service (DBaaS) providers
Database software
Serial number database software
- Features
- Ease of use
- Ease of management
- Quality of support
- Affordability
- Market presence
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What is Azure SQL Database
Azure SQL Database is a fully managed relational database service based on the Microsoft SQL Server engine and delivered on Microsoft Azure. It is used by application teams and data professionals to run transactional and mixed workload databases without managing underlying infrastructure. The service supports deployment models such as single databases, elastic pools, and managed instances, and it integrates with Azure identity, networking, monitoring, and automation services.
Managed SQL Server compatibility
Azure SQL Database uses the SQL Server database engine and supports T-SQL, enabling many applications built for SQL Server to migrate with fewer changes. It provides managed patching, backups, and high availability features that reduce operational overhead compared with self-managed database software. It also offers multiple deployment options (single database, elastic pools, managed instance) to match different compatibility and consolidation needs.
Elastic scaling and pooling
The service supports scaling compute and storage within service limits and offers elastic pools to share resources across multiple databases. This helps teams consolidate many small-to-medium databases and manage cost/performance tradeoffs with centralized controls. Built-in performance features (such as automatic tuning options) can reduce the need for manual index and query tuning in some scenarios.
Deep Azure platform integration
Azure SQL Database integrates with Azure Active Directory (Microsoft Entra ID) for authentication and supports Azure networking features such as private endpoints and firewall rules. It connects with Azure monitoring and logging tooling for operational visibility and alerting. These integrations simplify standardization for organizations already using Azure for compute, security, and governance.
Platform-specific feature differences
Not all SQL Server features and configurations are available in the same way in Azure SQL Database, and some capabilities require choosing a specific deployment model (for example, Managed Instance for higher compatibility). Certain server-level features, cross-database behaviors, and administrative controls can differ from on-premises SQL Server. This can introduce migration assessment and remediation work for legacy applications.
Cost and performance variability
Pricing depends on service tier, compute model, storage, and optional features, which can make forecasting more complex than fixed-capacity deployments. Workloads with spiky usage or inefficient queries can drive higher consumption and cost. Performance characteristics also depend on tier and configuration, so right-sizing and ongoing monitoring are typically required.
Azure dependency and constraints
Azure SQL Database is tied to the Azure ecosystem, which can increase switching costs for organizations pursuing multi-cloud portability. Service limits (such as maximum database size, throughput constraints, and feature availability by tier/region) may affect very large or specialized workloads. Some administrative tasks require Azure-specific tooling and operational practices rather than traditional database server management.
Plan & Pricing
| Plan / Purchase model | Price (official site) | Key features & notes |
|---|---|---|
| DTU-based (Single Database) — Basic (B) | Varies by region; see Azure pricing page (DTU fixed tiers billed per hour/month). | Entry-level DTU model: B = 5 DTUs, 2 GB included storage. DTU model includes Standard (S0–S12) and Premium (P1–P15) tiers with fixed DTU allocations and included storage. See official pricing page for region/currency-specific rates. |
| DTU-based (Single Database) — Standard (S-series) | Varies by region; see Azure pricing page. | Mid-range fixed DTU tiers (S0, S1, S2, ... S12) with included storage up to stated max per tier. |
| DTU-based (Single Database) — Premium (P-series) | Varies by region; see Azure pricing page. | Premium is for IO-intensive workloads; P1–P15 with larger DTUs and higher/max storage. |
| vCore-based — General Purpose (Provisioned) | Varies by region; billed per vCore (hour) or via reserved capacity (1/3 year). | Provisioned vCore model (select vCore count, Gen5/other hardware options). Backup storage included up to 100% of provisioned DB storage; additional backup storage billed separately. Supports Azure Hybrid Benefit (licensed) and reservations. |
| vCore-based — Business Critical (Provisioned) | Varies by region; billed per vCore (hour) or via reserved capacity. | Business-critical offers local SSD storage and higher availability; supports several hardware series and memory configurations. |
| vCore-based — Hyperscale (Provisioned / Serverless) | Varies by region; billed per vCore-second for serverless or per vCore for provisioned. | Hyperscale provides storage auto-scaling up to 100 TB; serverless compute bills per vCore-second with auto-pause/resume options and charges for storage and backup. |
| Serverless (vCore-based) | Varies by region; billed per vCore-second and GB-month for storage. | Auto-scaling compute and auto-pause; billed by vCore-second while active. The Azure Free account provides an "always free" monthly allocation specifically for serverless (see Free section). |
| Elastic Pools (DTU & vCore options) | Varies by region; see Azure pricing page. | Elastic pools share resources across multiple single databases; priced at the pool level. |
| Azure SQL Managed Instance (vCore-based) | Varies by region; see Azure pricing page. | Separate offering (instance-level) with vCore-based sizes and included storage; billed per vCore and storage. |
| Free / Trial (official) | Free: 100,000 vCore-seconds serverless / month + 32 GB storage (always free allocation). Trial: Azure free account $200 credit for 30 days. | Microsoft lists an "always" free monthly amount for Azure SQL Database (serverless: 100,000 vCore-seconds + 32 GB). New customers can also get $200 credit for 30 days via the Azure free account. |
Notes: Prices on the official Azure pricing pages are region- and currency-dependent and presented as estimates. Microsoft directs customers to the Azure Pricing Calculator or to contact sales for exact quotes and reserved-capacity discounts.
Seller details
Microsoft Corporation
Redmond, Washington, United States
1975
Public
https://www.microsoft.com/
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