Query builder escaping periods when using TableName.Column

I'm sorry. It was actually completely my bad, and the problem was somewhere else in the query. The error message said "Field name unkown" and showed me the part of the query where the field names got escaped to "`Table`.`Field`", so I just assumed that MySQL does not accept such a format - Although the error was somewhere else.

I'm really sorry for uselessly taking your time like this. Still, thanks for the replies!