bind_columns is binding columns ;), seriously though: NAME_lc are the lower case column names from the database, region and sales in this case, and these are in an array ref which is used as the keys for %row (using a hash slice). The reason it uses bind_columns is that it processes the columns one by one (allowing you to have a normal hash not a hash of an array). So it's doing something like this:
$sth->bind_columns( \( @row{ @{$sth->{NAME_lc} } } ));
# NAME_lc = lower case column name
# so it's equal to \@row{\@region} (and \@row{\@sales})
# binds \$row{region} much as it would \$region
while($sth->fetch)
{
# sets $row{region} with region's data
# does same with sales
print "$row{region}, $row{sales}\n";
# since this is rebinded each time %row is overwritten
}
I hope this helps
"Cogito cogito ergo cogito sum - I think that I think, therefore I think that I am." Ambrose Bierce
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