Looks like you've already done all the work with your query, so just do the math. 

my $last_id = '';
my $hrs_total;
my $tips_total;

foreach my $row (@$query) {
    if ($last_id ne $row->{id}) {
        $last_id = $row->{id};
        $hrs_total = 0;
        $tips_total = 0;
    }
    
    $row->{beg_hr} = $hrs_total;
    $row->{end_hr} = $hrs_total += $row->{hrs};
    $row->{beg_tip} = $tips_total;
    $row->{end_tip} = $tips_total += $row->{tips};

    print join("\t", @{$row}{qw(dat code id cur beg_hr end_hr beg_tip 
+end_tip)}) . "\n";
}

[download]
- Miller

In reply to Re: calculation using multiple rows of a query by wind
in thread calculation using multiple rows of a query by rocky13

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