# MySQL version numbers
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The version numbering sequence for the RDS for MySQL database engine is either in the form of *major.minor.patch.YYYYMMDD* or *major.minor.patch*, for example, 8.0.33.R2.20231201 or 5.7.44. The format used depends on the MySQL engine version. For information about RDS Extended Support version numbering, see [Amazon RDS Extended Support version naming](extended-support-versions.md#extended-support-naming).

**major**  
The major version number is both the integer and the first fractional part of the version number, for example, 8.0. A major version upgrade increases the major part of the version number. For example, an upgrade from *5.7*.44 to 8.0.33 is a major version upgrade, where *5.7* and *8.0* are the major version numbers.

**minor**  
The minor version number is the third part of the version number, for example, the 33 in 8.0.33.

**patch**  
The patch is the fourth part of the version number, for example, the R2 in 8.0.33.R2. An RDS patch version includes important bug fixes added to a minor version after its release.

**YYYYMMDD**  
The date is the fifth part of the version number, for example, the 20231201 in 8.0.33.R2.20231201. An RDS date version is a security patch that includes important security fixes added to a minor version after its release. It doesn't include any fixes that might change an engine's behavior.

The following table explains the naming scheme for RDS for MySQL version 8.4.


| 8.4 minor version | Naming scheme | 
| --- | --- | 
|  ≥ 3  |  New DB instances use *major.minor.patch.YYMMDD*, for example, 8.4.3.R2.20241201. Existing DB instances might use *major.minor.patch*, for example, 8.4.3.R2, until your next major or minor version upgrade. | 

The following table explains the naming scheme for RDS for MySQL version 8.0. 


| 8.0 minor version | Naming scheme | 
| --- | --- | 
|  ≥ 33  |  New DB instances use *major.minor.patch.YYMMDD*, for example, 8.0.33.R2.20231201. Existing DB instances might use *major.minor.patch*, for example, 8.0.33.R2, until your next major or minor version upgrade.  | 
|  < 33  |  Existing DB instances use *major.minor.patch*, for example, 8.0.32.R2.  | 

The following table explains the naming scheme for RDS for MySQL version 5.7.


| 5.7 minor version | Naming scheme | 
| --- | --- | 
|  ≥ 42  |  New DB instances use *major.minor.patch.YYMMDD*, for example, 5.7.42.R2.20231201. Existing DB instances might use *major.minor.patch*, for example, 5.7.42.R2, until your next major or minor version upgrade.  |