in reply to From database to hash table

There is no builtin, but there is DBI:
#!/usr/bin/perl
use warnings;
use strict;

use DBI;
use Data::Dumper;

my $db = DBI->connect("dbi:$driver:", q(), q());

my %hash;
my $sth = $db->prepare('select week, month, workperiod from tablename'
+);
$sth->execute;
while (my ($week, $month, $workperiod) = $sth->fetchrow_array) {
    $hash{$week} = [$month, $workperiod];
}
print Dumper \%hash;

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لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

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Re^2: From database to hash table
by Tux (Canon) on Sep 06, 2012 at 17:26 UTC

    Faster alternative 1:

    my %hash;
my %rec;
my $sth = $db->prepare ("select * from tablename");
$sth->execute;
$sth->bind_columns (\@hash{@{$sth->{NAME_lc}}});
while ($sth->fetch) {
    $hash{$rec{week}} = [ $rec{month}, $rec{workperiod} ];
    }

    [download]

    Faster alternative 2:

    my %hash;
my $sth = $db->prepare ("select week, month, workperiod from tablename
+");
$sth->execute;
$sth->bind_columns (\my ($week, $month, $workperiod));
while ($sth->fetch) {
    $hash{$week} = [ $month, $workperiod ];
    }

    [download]

    Readabler alternative 3:

    my $dbh = DBI->connect ("dbi:$driver:", "user", "pass", { FetchHashKey
+Name => "NAME_lc" });
my %hash;
my $sth = $db->prepare ("select week, month, workperiod from tablename
+");
$sth->execute;
while (my $rec = $sth->fetchrow_hashref) {
    $hash{$rec->{week}} = [ $rec->{month}, $rec->{workperiod} ];
    }

    [download]

    Enjoy, Have FUN! H.Merijn
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