No - with (pure) Perl, you will have to calculate such stuff yourself.

What you can do is map your Array of Hashes to a DBD::SQLite table, backed by your Perl data structure and then just use SQL to query your Perl data structures:

use DBI;
use DBD::SQLite;

# ...
sub import_data( $self, $book ) {
    my $dbh = DBI->connect('dbi:SQLite:dbname=:memory:',undef,undef,{A
+utoCommit => 1, RaiseError => 1,PrintError => 0});
    $dbh->sqlite_create_module(perl => "DBD::SQLite::VirtualTable::Per
+lData");

    my $sql_name = "mytable";
    my $colnames = join ", ", qw(PvcCount LCir RCir);

    local $table_000 = \@data;
    my $tablevar = __PACKAGE__ . '::table_000';
    my $sql = qq(CREATE VIRTUAL TABLE temp."$sql_name" USING perl($col
+names, arrayrefs="$tablevar"););
    $dbh->do($sql);

    my $sum = $dbh->selectall_arrayref(<<'SQL');
        select
               sum( PvcCount )
             , sum(LCir)
             , sum(RCir)
             , EquipName
          from mytable
      group by EquipName
SQL

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In reply to Re^3: Refer calculated fields by Corion
in thread Refer calculated fields by pragovnj

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