Export some fields of a table

[crepo]

I'm looking of a way to make a selective export from the users of my vbulletin database.

In the cron of my server (have ssh access) I want to start a export script that gives me a CSV file with the information of the vbulletin DB / user table and then only the fields “usersid / username / password / email” for all the records.

For or backup I use MySQLdump, but then I get the full database, and in this case I want only a small selection fields of it.

Any idea how to do this?

Thanks,
peter