MySQL在表中显示每小时的条目数

Question

New link - results off by 1我需要在表格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，小时数列没有打球，因为这应该是 0:00-1 .... 22.00-23.00 等。预期结果的总数是 19，当您将结果加在一起时也是正确的。到了我现在不知道脚本中发生了什么并且不知道从哪里开始修复格式问题的地步。非常感谢任何帮助。Current Result in HTML Page

// 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>";
    }
}
?>

Answer 1

我不是 PHP 专家，但您的 i 变量不会在 while 内递增，只需添加 $hours[$i++] 或从 $timea['hours'] 获取标签

你可能不需要for，只需初始化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>";
}