A do block just executes the contained code and returns the last thing that was evaluated. In this context, I use it to create a tight scope for the $count and $qs variables. It is functionally equivalent to 
my $count = @$columns;
my $qs = join ',', ('?') x $count;
my $sql = <<EOSQL;
INSERT INTO VoucherMRPDataTable_Frt_TariffModel
VALUES ($qs)
EOSQL

[download]
except that in the latter case, you'll be carrying around two more variables, one of which has a very generic name.

Does that clarify things?

#11929 First ask yourself `How would I do this without a computer?' Then have the computer do it the same way.

In reply to Re^5: Text::CSV not able to execute insert query dynamically. by kennethk
in thread Text::CSV not able to execute insert query dynamically. by Ankur_kuls

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