While what you are looking for can be done, when you
finish what you will be doing is reinventing the
relational database. Rather than continue down this
path I would suggest installing MySQL and learning how
to use it instead. It will take less time to learn, and
when you are done you will have a more robust and flexible
solution, which scales better.
Depending on your needs you might like to start instead
with the DBD::CSV driver for DBI. That
way you don't have to install a database first (though I
strongly recommend doing so for the performance,
scalability, ability to handle concurrent connections,
etc).
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