Miller

# Calculate average and sum of values by category
# This Miller script processes CSV data

begin {
    @total_sum = 0;
    @total_count = 0;
}

{
    @sum_by_category[$category] += $value;
    @count_by_category[$category] += 1;
    @total_sum += $value;
    @total_count += 1;
}

end {
    for (category, sum in @sum_by_category) {
        count = @count_by_category[category];
        avg = sum / count;
        print "Category: " . category;
        print "  Sum: " . sum;
        print "  Count: " . count;
        print "  Average: " . avg;
        print "";
    }
    print "Overall sum: " . @total_sum;
    print "Overall count: " . @total_count;
    print "Overall average: " . (@total_sum / @total_count);
}