| Plan | DTUs ($1.50/DTU) | Data Max Size | Price |
| Basic | 5 | 2 GB | $4.99/month |
| Standard | 10 | 250 GB | $15.00/month |
| Standard | 20 | 250 GB | $30.00/month |
Can adjust plan anytime.
Service tiers in the DTU-based purchase model are differentiated by a range of compute sizes with a fixed amount of included storage, fixed retention period for backups, and fixed price. All service tiers in the DTU-based purchase model provide flexibility of changing compute sizes with minimal downtime; however, there is a switch over period where connectivity is lost to the database for a short amount of time, which can be mitigated using retry logic. Single databases and elastic pools are billed hourly based on service tier and compute size.
Important
Azure SQL Managed Instance does not support a DTU-based purchasing model.
Sources:
https://docs.microsoft.com/en-us/azure/azure-sql/database/service-tiers-dtu
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