20090619
   ID = 0
   TIMESTAMP = 1244127600
   COUNT_2 = 10

##</code><code>##

20090619
   ID = 0
   TIMESTAMP = 1244127600
   COUNT_1 = 10
20090619
   ID = 1
   TIMESTAMP = 1244127600
   COUNT_1 = 10
20090619
   ID = 1
   TIMESTAMP = 1244127600
   COUNT_2 = 10
20090619
   ID = 2
   TIMESTAMP = 1244127600
   COUNT_1 = 10
20090619
   ID = 3
   TIMESTAMP = 1244127600
   COUNT_2 = 10

20090619
   ID = 4
   TIMESTAMP = 1244127600
   COUNT_1 = 10

##</code><code>##

20090619
   ID = 4
   TIMESTAMP = 1244127600
   COUNT_2 = 10

##</code><code>##

20090619
   ID = 0
   TIMESTAMP = 1244127600
   TOTAL = COUNT_1 + COUNT_2
20090619
   ID = 1
   TIMESTAMP = 1244127600
   TOTAL = COUNT_1 + COUNT_2
20090619
   ID = 2
   TIMESTAMP = 1244127600
   TOTAL = COUNT_1    --> COUNT_2 does Not exist
20090619
   ID = 4
   TIMESTAMP = 1244127600
   TOTAL = COUNT_1 + COUNT_2

##</code><code>##

$hash = (
   'FILE_MINUTE_2' => { 1 => {ID=1, COUNT_1 = 10, COUNT_2 = 20},
                        2 => {ID=2, COUNT_1 = 10, COUNT_2 = undef},
                        3 => {ID=3, COUNT_1 = undef, COUNT_2 = 20},
                        4 => {ID=4, COUNT_1 = 10, COUNT_2 = 20},
                      },
                      

);