Hello Monks, Greetings !!

I am facing problem while executing an outer join querry in Oracle 8i DB using Perl.

I am using perl DBI::DBD 

#open connection to the database
my $db = DBI->connect("dbi:Oracle:host=$host;sid=$sid;port=$port", $ui
+d, $pwd) or die "Error while connecting to database!!!\nIncorrect Con
+nection information\n";
 
my $SQL_query;
    
    $SQL_query = qq {SELECT A.DISPLAY_ORDER, A.NAME PARENT_NAME, B.NAM
+E CHILD_NAME FROM CATEGORY A, CATEGORY B WHERE B.ID_PARENT_CATEGORY(+
+) = A.ID_CATEGORY AND A.DISPLAY_ORDER != -1 ORDER BY DISPLAY_ORDER};
                            
    debug($SQL_query);
    
    my $sth = $db->prepare( $SQL_query )  or die "Can't prepare SQL st
+atement: $DBI::errstr\n";
    
 ### Execute the statement in the database
 $sth->execute or die "Can't execute SQL statement: $DBI::errstr\n";
 
my ($pdisplay_order, $parent_name, $child_name);
   
 # Bind perl variables to columns:  
 my $rv = $sth->bind_columns(\$pdisplay_order, \$parent_name, \$child_
+name);
 
### Retrieve the returned rows of data
 while ($sth->fetchrow_array()) {
 chomp($pdisplay_order);
 chomp($parent_name);
 chomp($child_name);
 
 print "$pdisplay_order, $parent_name, $child_name\n";
 }

[download]
However, when I use the following, I can fetch the values from the tab
+le / view
 #$SQL_query = qq {SELECT display_order, name, id_parent_category from
+ CATEGORY ORDER BY DISPLAY_ORDER };
    #$SQL_query = qq {SELECT display_order, name, id_parent_category f
+rom MY_VIEW };

I tried creating a oracle view for the SQL query which has the outer j
+oin and used the following query but still I could not display the va
+lues from the array.
    #$SQL_query = qq {SELECT * from VW_CATEGORIES};

[download]

Any immediate help is appreciated

CHEERS Ananda

In reply to Reading Database with Outer Joins by Ananda

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