# RDS version numbers in RDS for PostgreSQL
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RDS version numbers use the `major.minor.patch` naming scheme. An RDS patch version includes important bug fixes added to a minor version after its release. For information about RDS Extended Support version numbering, see [Amazon RDS Extended Support version naming](extended-support-versions.md#extended-support-naming).

To identify the Amazon RDS version number of your database, you must first create the `rds_tools` extension by using the following command:

```
CREATE EXTENSION rds_tools;
```

Starting with the release of PostgreSQL version 15.2-R2, you can find out the RDS version number of your RDS for PostgreSQL database with the following SQL query:

```
postgres=> SELECT rds_tools.rds_version();
```

For example, querying an RDS for PostgreSQL 15.2 database returns the following:

```
rds_version
----------------
 15.2.R2
(1 row)
```