RDS for SQL Server
- Docs: https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_SQLServer.html
- Docs (llms.txt): https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/llms.txt
- Data model: Relational (Microsoft SQL Server)
- Query language: T-SQL
- Compatibility: SQL Server (Express, Web, Standard, Enterprise editions)
- Serverless: No (fixed instance types)
- Scale to zero: No
- VPC required: Yes
- Multi-region: Cross-region read replicas (Enterprise Edition)
- Free Tier: 12 months (750 hrs/month db.t3.micro, Express Edition + 20 GB)
- Min cost: $0 (free tier, Express) → ~$50/month (Web) → ~$500/month (Standard)
- Time to first query: 15-20 min (VPC + instance + SQL Server configuration)
- Key features: SQL Server features (SSRS, SSIS, SQL Agent jobs), Windows Authentication, automated backups, Multi-AZ with Always On
- Limitations: Microsoft licensing cost (License Included or BYOM), no serverless, Windows-centric tooling
- Best for: Lift-and-shift SQL Server migrations, .NET applications, teams with T-SQL expertise and existing licenses
- Not for: New applications (use Aurora PostgreSQL or DSQL), cost-sensitive workloads, teams looking to move off commercial licensing (that's a refactor)