I mistakenly made my question on Stack Overflow into a community wiki. How can I change my question back from a community wiki?
It used to be that the only thing you can do is delete it and post it again as a new question.
However, as Sathya points out in his answer moderators have the ability to remove the CW status if they feel it is appropriate. So flag the question using the "other" option and explain your reasons.
Given that the original was down-voted (albeit without comment) you might want to take this opportunity to rework the question to see if you can improve it. However, this could lead to the question being closed as a duplicate - so take care with this option.
Unfortunately I don't know anything about Perl and DBI so I can't help you there.