如何從mysql顯示每年的條形圖值使用php的數據庫

正如你所看到的BarChart，它被設置爲顯示按日期的值，但它分別顯示相同的日期值，而我希望它總結相同的值並按年顯示它們，而不會重複年份！如何從mysql顯示每年的條形圖值使用php的數據庫

MySQL表

----------------------------- 
date  | amount | carno 
----------------------------- 
2013-8-31 | 62.840 |xyz 
----------------------------- 
2013-7-31 | 57.161 |sdas 
---------------------------- 
2012-12-31 | 44  |sgdg

請參閱圖像瞭解這裏的barchart.jpg

我想這樣的 http://www.koolfree.com/ImageUpload/uploads/1381400556.jpg

，這是一部開拓創新的照片 http://www.koolfree.com/ImageUpload/uploads/1381365670.jpg

這裏是php代碼barchart.php

<?php 
include 'config.php'; 
$link=mysql_connect("$hostname","$username","$password")or 
die('Could not connect: ' . mysql_error()); 
mysql_select_db("$dbname",$link); 
include 'create.php'; 
$sql="SELECT date,amount FROM $tablename GROUP BY date"; // Give Your field Name 
$result = mysql_query($sql); 
$graphtitle='BarChart';//Graph Title 
$xname='Year'; //X-axis Name 
$yname='Values';//y-axis name 
$img_width=400;//image height 
$img_height=300;//image width 
$margins=70; 
$ymargin=6; 
$count=mysql_affected_rows(); 
$graph_width=$img_width - $margins * 2; 
$graph_height=$img_height - $margins * 2; 
$bar_width=25; 
$total_bars=$count; 
$gap= ($graph_width- $total_bars * $bar_width)/($total_bars +1); 
$img=imagecreate($img_width,$img_height); 
include 'barcolor.php'; 
imagefilledrectangle($img,0,0,0,0,$bag_color); 
imageline($img,$margins,$img_height-45,$img_width-20,$img_height-45,$xyline_color); 
imageline($img,$margins,$ymargin,$margins,$img_height-45,$xyline_color); 
$maxvalue="select max(date) as amount from $tablename";//Give your field name for Y axis 
$max=mysql_query($maxvalue); 
while($inf1= mysql_fetch_array($max)) 
    { 
    $ratio=$graph_height/$inf1[0]; 
    } 
$horizontal_lines=8; 
$horizontal_gap=($img_height+20)/$horizontal_lines; 
for($j=1;$j<=$horizontal_lines;$j++) 
{ 
     $y=($img_height-48) - $horizontal_gap * $j ; 
     //imageline($img,$margins+1,$y,$img_width-20,$y,$hline_color); 
     $v=intval($horizontal_gap * $j /$ratio); 
     imagestring($img,2,$margins-30,$y-5,$v,$values_color); 
} 
$i=0; 
while($inf = mysql_fetch_array($result)) 
    { 
     $x1=($margins+10) + ($gap+5) + $i * ($gap+$bar_width) ; 
     $x2=$x1+$bar_width; 
     $y1=($img_height-46)- ceil($inf[1] * $ratio) ; 
     $y2=($img_height-46); 
     imagestring($img,2,$x1+1,$y1-15,$inf[1],$values_color); 
     imagestring($img,2,$x2-23,$img_height-43,$inf[0],$values_color); 
     imagefilledrectangle($img,$x1,$y1,$x2,$y2,$bar_color); // Draw bar 
    $i++; 
    } 
imagestring($img,8, ($img_width-$margin)/2, 0, $graphtitle, $txt_color); 
imagestring($img,5, ($img_width-$margin)/2, $img_height-($ymargin+10), $xname, $txt_color); 
imagestringup($img,5,10,($img_height-$ymargin)/2, $yname, $txt_color); 
//header('Content-type: image/png'); 
imagepng($img, 'barchart.jpg'); 
echo "<div style='border:1px solid #d8d8d8;width:$img_width'><img src='barchart.jpg'></div>"; 
?>

這裏是barcolor.php

<?php 
$bag_color=imagecolorallocate($img,246,246,246);//Baground color 
$xyline_color=imagecolorallocate($img,135,135,135);//XY-axis color 
$bar_color=imagecolorallocate($img,172,212,123);//Bar color 
$values_color=imagecolorallocate($img,2,2,2);//values color 
$txt_color=imagecolorallocate($img,227,113,39);//text color 
?>

，這裏是config.php文件

<?php 

$username = "root"; 
$password = ""; 
$hostname = "localhost"; 
     $dbname = "car"; 
    $tablename = "fuel"; 

?>

請幫我解決這個問題，感謝

來源

2013-10-09 user2468472

改變你這樣的查詢

SELECT YEAR(date) AS date, SUM(amount) AS amount FROM $tablename GROUP BY YEAR(date)

來源

2013-10-09 11:25:22 arilia

謝謝你，親愛的，現在工作正常 – user2468472

如何從mysql顯示每年的條形圖值使用php的數據庫

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