in reply to How can I display an entire MySQL table in Perl?

There are a few ways to display an entire table. The idea is to iterate through the rows that are returned (a list), where each row contains a numbers of elements (another list). 
# prepare the SQL
my $sth = $dbh->prepare('select * from table');

# execute
$sth->execute();

# fetch first row
my @row = $sth->fetchrow_array();

# print remaining rows 
while (my @row = $sth->fetch_array()) {
   print join(',', @row), "\n";
}

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Here is a different way that uses my favorite DBI method, selectall_arrayref(): 
my $res = $dbh->selectall_arrayref('select * from table');

foreach my $row (@$res) {
   print join(',', @$row), "\n";
}

# html-table style
print "<table>\n";
foreach my $row (@$res) {
   print "\t<tr>\n";
   print map { "\t\t<td>$_</td>\n" } @$row;
   print "\t</tr>\n";
}
print "</table>\n";

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If you find yourself doing a lot of the last example, check out DBIx::XHTML_Table, but HTML::Template is still the better choice. Be sure and read HTML::Template Tutorial (which i _finally_ updated to make 'Y2K+2' compliant) for info on displaying database results with it.

UPDATE:
Trimbach++ for reminding what i have so long forgotten.

Just to keep up with ease, here is how it's done in DBIx::XHTML_Table: 

use DBIx::XHTML_Table;

my $table = DBIx::XHTML_Table->new(
  'DBI:mysql:database:host', 'user', 'pass')
) || die;

$table->exec_query('select * from table');
print $table->output();

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And that includes adding the names of the database columns wrapped in <th> tags. You can also stack the method calls: 
print DBIx::XHTML_Table
   ->new('DBI:mysql:database:host', 'user', 'pass')
   ->exec_query('select * from table')
   ->output();

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Of course, if that's all that DBIx::XHTML_Table did, then i would argue that a better way would be to wrap the CGI way into a subroutine ... but, it does more ... ;)

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
F--F--F--F--F--F--F--F--
(the triplet paradiddle)

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Re: Re: How can I display an entire MySQL table in Perl?
by Trimbach (Curate) on Jan 02, 2002 at 04:07 UTC
    If all you want to do is dump the contents of a SELECT statement to an HTML table, use the Power of the CGI module. Instead of this (from jeffa): 
    # html-table style
print "<table>\n";
foreach my $row (@$res) {
   print "\t<tr>\n";
   print map { "\t\t<td>$_</td>\n" } @$row;
   print "\t</tr>\n";
}
print "</table>\n";

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    I would do this: 
    use CGI qw(:standard *table);
use CGI::Pretty; # For pretty-printed HTML

print start_table;
print Tr(td($_)) foreach @$rows;
print end_table;

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    Yes, it's just that easy. Of course, the more general solution is using some sort of templating scheme, but in general this is a pretty sweet way of outputting dynamic table data on the fly.

    Gary Blackburn
    Trained Killer

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[select]

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