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Linking databases using cgi or perl

Posted on 1998-08-05
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Last Modified: 2010-03-05
How do I display the data from a database on a web site so that people may come and view it, make changes, buy things etc?
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Question by:goanakin
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by:b2pi
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What kind of database is is?
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by:n0thing
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You could use Perl's DBI (Database Interface) and depending on
the database you use(Sybase, Oracle,...), you could install some
extra modules into perl in order to talk directly to the DB and
send the data back to the Web. It is a complex question and I can't have a precise answer to it. Check www.perl.com and the CPAN archive for the modules you need. All docs are online.
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by:kaijen
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If you're working on a win32-basis you also could use the Win32::ODBC module. More information on databases with Win32 you'll find at http://www.geocities.com/SiliconValley/Way/6278/perl-win32-database.html

Best regards,
Kai.
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Christoph082498 earned 200 total points
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If you want to acces an SQL Database this may help you. The script uses the WIN32::ODBC library which you can download from ftp.roth.com. I use this script as a formhandler  to display data of an Employeedatabase in an HTML-file.

if($ENV{'REQUEST_METHOD'} eq 'GET')  #  with this if  conditional I read the values
   {                                                         # of the elements in the previous form
    $Daten = $ENV{'QUERY_STRING'}      # both methods get and post can be used
   }
  else
   {
    read(STDIN, $Daten, $ENV{'CONTENT_LENGTH'});
   }

$Equal = index($Daten,"=")+1;                             # this is for splitting the string so that
$Datapart = substr($Daten, $Equal);                     # I can use the data
$Ampersand = index($Datapart, "&");
$Datapart1 = substr($Datapart, 0, $Ampersand);

use Win32::ODBC;                                     # this is the Win32::ODBC lib I mentioned

if(!($db = new Win32::ODBC("DSN=SCD; UID=UserID; PWD=Password;")))
{                  # The DSN you can set as a System DSN in Settings|ODBC32 if you use NT
   print "Error connecting to $DSN\n";
   print "Error: ". Win32::ODBC::Error() . "\n";
   exit;
}
$sq ="PUT YOUR SQL-STATEMENT HERE (E.G. SELECT * FROM TABLE) ";
if ($db->Sql($sql))
{
   print "SQL failed.\n";
   print "Error: " . $db->Error() . "\n";
   $db->Close();
   exit;
}
$i=0;
while ($db->FetchRow())         # Now I fill some arrays with the data from the database
{
   @name[$i]=$db->Data( "surname");
   @firstname[$i]=$db->Data("givenname");
   @telephone[$i]=$db->Data("telephonenumber");
   @department[$i]=$db->Data("department");
   @Email[$i]=$db->Data("internetaddress");
   @searchkey[$i]=$db->Data("searchkey");
   $i++;
}

# Now you can output an HTML page with print statements like these:

print "Content-Type: text/html\n\n";
print "<HTML>\n";
print "<HEAD>\n\n";
print "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=iso-8859-1\">\n";

Just copy the HTML copy into the print statements.

To insert data into a listbox use a for statement like this:
print "<form name=\"EmployeeSurname\">\n";
print "    <p><select name=\"Surname\" size=\"1\" onChange=\"Eintragen()\">\n";
for($j=0; $j<$i; $j++)
   {
    print "<option><b>",@name[$j], " ", @firstname[$j], "</b>", ";", @department[$j],
           ";", @telephone[$j], ";", @Email[$j], ";", @searchkey[$j], "</option>\n";
   }
print "        </select>\n";

I hope this will help you

Christoph
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