Question: If so where can I find the installation?

Answer: 
no, it isn’t—only on server version:

<http://developer.apple.com/internet/opensource/osdb.html>
As a side note: when using Time Machine you may be interested in excluding the log files, which by default are hidden in a directory that even an admin account cannot access:

```
ls -la /usr/local/mysql-5.0.51a-osx10.5-x86
[..]
drwxr-x---   4 _mysql  wheel    136 Jul 10 23:06 data
[..]
```

Or, change the MySQL settings to move the logs to some temp folder.

(To remove existing MySQL log files from the backup disk, you need to [run Time Machine as root](https://superuser.com/questions/35152/how-do-i-retrieve-files-from-time-machine-backups-from-another-computer/35309#35309).)