If it is an architecture question, then first you must answer some questions, such as: can we have more than one worker assigned to the same work and can one worker be assigned to more than one work?

Usually, one would have (at least) three tables in the database: one for the works, one for the workers and one which makes a link between works and workers. In that way you can have a many-to-many relationship between works and workers.

The way it looks now, is that your table "Workers" is a bit like a "Link" table, combined with a "Workers" table. In the long run and to have the maximum flexibility, it is better to split your "Workers" table into "Link" and "Workers".

There are quite a bit of modules on CPAN for page navigation, such as Data::Paginate, Data::Page and Data::Page::Navigation, Data::Pageset, Data::Pager, (and the list goes on and on). Or for something that is more closely linked to the DBI: DBIx::Pager. Of course frameworks such as DBIx::Class and Catalyst have this functionality already built-in.