in reply to concatenating variables

There are ways to do this but it is generally considered bad practice to do so unless you have no other choice. Consider instead an array.
$lines[0] = "use pricedb"; $lines[1] = "second statement"; for my $sql (@lines) { $dbh->do($sql); # check code here }
That easily lends itself to pulling queries from a file or building queries programmatically. It also means you can have an arbitrary number of lines. I highly suggest getting
Learning Perl
The Camel Book
If you are going to be doing any amount of Perl programming, both are very useful. Of course there are lots of online tutorials, too.

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