Wise Monks,

I have multiple hashrefs of HoH’s, which are populated with data from multiple tables within a database. Having understood how to associate a Primary Key to a Foreign Key by doing the following: 

$sql1 = “select * from table1”;
$sql2 = “select * from table2”;

my $table1= $dbh->selectall_hashref($sql1, "primary_key");
my $table2= $dbh->selectall_hashref($sql2, "primary_key");

foreach (keys(%$table1)) {
 $table1_foreign_key = 
  $table2->{$table1->{$_}{foreign_key}}{primary_key};
}

[download]

My Problem is this: There exists a $table3 that has a primary_key that is not associated with a foreign_key in $table1. The only way to associate records is through a foreign_key_table3 subkey that exists in both $table1 and $table3 hashrefs. How can I extrapolate records from $table1 and $table3 hashref’s that share the same subkey value for the foreign_key_table3 subkey?

Thanks, 3dbc.

UPDATE: 

foreach $tbl1_primary (keys(%$table1)) {
 foreach (keys(%$table3)) {
  while ( $table3->{$_}{$table1->{$tbl1_primary}{foreign_key}} == 
$table3->{$_}{foreign_key} ) {
  $table1_foreign_key_table3 = 
   $table3->{$_}{$table1->{$tbl1_primary}{foreign_key}};
  }
 }
}

[download]
update2 
$sql_obfuscate = qq {
SELECT *
FROM clinvest.dbf a,
     clinvpmt.dbf b,
     clinvchg.dbf c,
     ernames.dbf d,
     ercontct.dbf e
WHERE a.CID = b.INVESTID
and a.CID = c.INVESTID
and a.NAMEID = d.NAMEID
and a.NAMEID = e.NAMEID
};

[download]

In reply to associating subkeys of separate HoH's by 3dbc

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