$res  =  mysql_query("SELECT `electro1`, `electro2`, `electro3`, `electro4`, `electro5` FROM `energobalans2012` WHERE `date` BETWEEN '2011-12-15' AND '2012-01-31' ORDER BY `date`")
or die(mysql_error());


while($row = mysql_fetch_assoc($res)) {
	echo $row['electro1']." - ".$row['electro2'].'...'."<br>";
}

echo (int)$line[0]+(int)$line[1];

$var = array mysql_fetch_assoc ($line)
// или для двумерного
  $var= array mysql_fetch_array ($line)

 while($var)
   {// как пример выборки  10 рядов
      echo ($var<=10) ;  
   }

$rez=0;
for ($year>=2011; $year<=2012; $year++)
{
	for ($month>=1; $month<=12; $month++)
	{
		$line = mysql_fetch_row(mysql_query("SELECT `electro1`, `electro2`, `electro3`, `electro4`, `electro5` FROM `energobalans2012` WHERE `date`='$year-$month-01'"));
		for ($i>=0; $i<=4; $i++)
		{
			$rez=$rez+$line[$i];
		}
	}
	echo $rez;
}

$year1=2012;
$month1=1;
$k1=date("t", strtotime($year1 . "-" . $month1. "-01")); // получаем количество дней в этом месяце

$year2=$year1;
$month2=$month1+1;
$k2=date("t", strtotime($year2 . "-" . $month2. "-01")); // получаем количество дней в следующем месяце

$line  =  mysql_query("SELECT `electro1`, `electro2`, `electro3`, `electro4`, `electro5` FROM `energobalans2012` WHERE `date` BETWEEN '$year1-$month1-15' AND '$year2-$month2-$k2' ORDER BY `date`");


for ($i>=0; $i<=$k1+$k2; $i++)
{	$rez=0;
	$row = mysql_fetch_assoc($line);
	for ($j>=0; $j<=count($row); $j++)
	{
		$rez=$rez+$row[$j];
	}
	echo "$i - $rez - ".count($row)."<p>";
}

$date1 = '2012-01-01';
$date2 = '2012-01-07';
$res  =  mysql_query("
SELECT `electro1`, `electro2`,`date` FROM `energobalans2012`
 WHERE `date` BETWEEN '".$date1."' AND '".$date2."' ORDER BY `date`") 
or die(mysql_error());

$arr_iz_tablic = array();
while($row = mysql_fetch_row($res)) {
	array_push($arr_iz_tablic,$row[2]);
}
mysql_data_seek($res,0);

$mas = array();
$start = strtotime($date1);
while ($start <= strtotime($date2)) {
	array_push($mas,date("Y-m-d",$start));
	$start = $start + (3600*24);
}

foreach ($mas as $v) {
	if (in_array($v,$arr_iz_tablic)) {
		$row = mysql_fetch_row($res);
		echo $row[0]." | ".$row[1].'<br>';
	}
	else {
		echo '0 | 0 <br>';
	}
}

$i=0;
foreach ($mas as $v) {
	if (in_array($v,$arr_iz_tablic)) {
		$row = mysql_fetch_row($res);
		echo $row[0]." | ".$row[1].'<br>';
		$num1[$i]=$row[0];
		$num2[$i]=$row[1];
		$i++;
	}
	else {
		$num1[$i]=0;
		$num2[$i]=0;
		$i++;
		echo '0 | 0 <br>';
	}
}

for ($i>=1; $i<=count($num1); $i++)
{	$psum=$num1[$i-1]+$num2[$i-1];
	if ($i>1 AND $psum==0)
	{	for ($q<=$i-1; $q>=0; $q--)
		{	$psum=$num1[$q]+$num2[$q];
			if ($psum>0)
			break;
		}
	}
	$x=($num1[$i]+$num2[$i])-$psum;
	echo "$i - $x <p>";
}

foreach ($mas as $i=>$v) 
{
echo $i.'-номер переменной массива, '.$v.'-его значение';
}

$date1 = '2012-01-01';
$date2 = '2012-01-10';
$res  =  mysql_query("
SELECT `samedate`, `electro1`, `electro2` FROM `1`
 WHERE `date` BETWEEN '".$date1."' AND '".$date2."' ORDER BY `date`") 
or die(mysql_error());

$arr_iz_tablic = array();
while($row = mysql_fetch_row($res)) {
	array_push($arr_iz_tablic, $row[0]);
}
mysql_data_seek($res,0);

$mas = array();
$start = strtotime($date1);
while ($start <= strtotime($date2)) {
	array_push($mas,date("Y-m-d",$start));
	$start = $start + (3600*24);
}


foreach ($mas as $i=>$v) {
	if (in_array($v,$arr_iz_tablic)) {
		$row = mysql_fetch_row($res);
		$num1[$i]=$row[1];
		$num2[$i]=$row[2];
		$num3[$i]=$row[0];
	}
	else {
		$num1[$i]=0;
		$num2[$i]=0;
		$num3[$i]=0;
	}
}

for ($i=0; $i<count($num1); $i++)
{	
	echo "$num3[$i]: $num1[$i]<p>";
}

2012-01-01: 5083

2012-01-02: 5098

2012-01-03: 5113

2012-01-04: 5134

2012-01-05: 5158

2012-01-06: 5182

2012-01-07: 5200

2012-01-08: 5216

2012-01-09: 5231

0: 0

$date1 = '2012-01-01';
$date2 = '2012-01-15';

2012-01-01: 5083

2012-01-02: 5098

2012-01-03: 5113

2012-01-04: 5134

2012-01-05: 5158

2012-01-06: 5182

2012-01-07: 5200

2012-01-08: 5216

2012-01-09: 5231

2012-01-10: 5252

2012-01-11: 5275

2012-01-12: 5303

2012-01-13: 5324

2012-01-14: 5344

0: 0