# Document history
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The following table describes significant changes to this guide.


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| Change | Description | Date | 
| --- |--- |--- |
| Updated details in the comparison table | Updated the [Choosing the right database for your RTO and RPO requirements](choosing-database.md) section. | June 29, 2026 | 
| Updated details in the comparison table | In the [Choosing the right database for your RTO and RPO requirements](choosing-database.md) section, updated the information about Amazon RDS for Db2, and corrected RPO details for Amazon RDS for Oracle and Amazon RDS for Oracle (alternative). | June 11, 2025 | 
| Added Amazon RDS for Db2 | In the [Choosing the right database for your RTO and RPO requirements](choosing-database.md) section, added information about Amazon RDS for Db2. | March 4, 2024 | 
| Updated RTO/RPO details | In the [Choosing the right database for your RTO and RPO requirements](choosing-database.md) section, updated the information about Amazon DocumentDB, Amazon ElastiCache (Redis OSS), and Amazon RDS for SQL Server. | April 19, 2023 | 
| Initial publication | — | October 26, 2022 |