This is fine until your table outgrows your memory: selectall_arrayref will read all rows into memory and then pass it to csv (), whereas using a fetch handle has virtually no memory overhead.

my $sth = $dbh->prepare ("select * from foo");
$sth->execute;
csv (out => "foo.csv", in => sub { $sth->fetch }, undef_str => "\\N");

[download]

Enjoy, Have FUN! H.Merijn

In reply to Re^3: Select DB data into CSV file by Tux
in thread Select DB data into CSV file by 1nickt

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