MySQL显示表中每小时的条目数

新链接 - 结果减少 1 https://i.stack.imgur.com/8G1Jh.png我需要在表中回显给定日期每小时的条目数，即使它们是 0。这似乎正在发生，但以一种奇怪的方式......如您所见，小时列没有发挥作用这应该是 0:00-1 .... 22.00-23.00 等。预期结果总数是 19，当您将结果相加时，这也是正确的。我现在不知道脚本中发生了什么，也不知道从哪里开始修复格式问题。非常感谢任何帮助。HTML 页面中的当前结果 https://i.stack.imgur.com/SvJ2g.png

// Get list of times per hour for reader 
$sqltimea = "SELECT   CONCAT(Hour, ':00-', Hour+1, ':00') AS hours,
 COUNT(r.readerid) AS tapcount
FROM 
   (
     SELECT  '0' AS Hour
     UNION ALL SELECT  '1' UNION ALL SELECT  '2' UNION ALL SELECT  '3'
     UNION ALL SELECT  '4' UNION ALL SELECT  '5' UNION ALL SELECT  '6'
     UNION ALL SELECT  '7' UNION ALL SELECT  '8' UNION ALL SELECT  '9'
     UNION ALL SELECT '10' UNION ALL SELECT '11' UNION ALL SELECT '12'
     UNION ALL SELECT '13' UNION ALL SELECT '14' UNION ALL SELECT '15'
     UNION ALL SELECT '16' UNION ALL SELECT '17' UNION ALL SELECT '18'
     UNION ALL SELECT '19' UNION ALL SELECT '20' UNION ALL SELECT '21'
     UNION ALL SELECT '22' UNION ALL SELECT '23'
 ) AS h
  LEFT JOIN taps t ON HOUR(t.`time`) = Hour 
AND
    DATE(t.time) = '2016-01-15' LEFT JOIN
 readers r
 ON r.readerid = t.readerid AND r.type = 'A'
GROUP BY Hour
ORDER BY Hour";
$qtimea = mysql_query($sqltimea);

// THE CHALLENGE! Put it in a table!

$hours = array("0:00-1:00", "1:00-2:00", "2:00-3:00", "3:00-4:00", "4:00-5:00", "5:00-6:00", "6:00-7:00", "7:00-8:00", "8:00-9:00", "9:00-10:00", "11:00-12:00", "12:00-13:00", "13:00-14:00", "14:00-15:00", "15:00-16:00", "16:00-17:00", "17:00-18:00", "18:00-19:00", "19:00-20:00", "20:00-21:00", "21:00-22:00", "22:00-23:00", "23:00-24:00");

for($i = 0; $i <= 23; $i++) {
    while($timea = mysql_fetch_assoc($qtimea)) {
        $tapsa = $timea['tapcount'];
        echo "<tr><td>" . $hours[$i] . "</td><td>" . $tapsa . "</td></tr>";
    }
}
?>

我不是 PHP 专家，但是你的i变量不会在内部增加while只需添加$hours[$i++]或者只是从以下位置获取您的标签$timea['hours']

你可能不需要for只是初始化i = 0

while($timea = mysql_fetch_assoc($qtimea)) {
        $tapsa = $timea['tapcount'];
        $hour_label = $timea['hours'];
        echo "<tr><td>" . $hour_label . "</td><td>" . $tapsa . "</td></tr>";
}