There are two sides to learning database programming.
One side concerns database design. Google for database normal form for some of the many treatments of making a db maintainable, efficient, and no bigger than necessary.
The other side is learning SQL. It is an oddity of a language to many. It has a strong component of functional programming, but without any of the elegance.
The third half, of course, is to learn DBI.pm. That may as well be the first half ;-)
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