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Mysql比较存储到今天日期的日期

我想通过我的数据库dateandtime并将它们与当前日期和时间进行比较,并说出哪一个更大.

<?php
include_once("db.php");
$date = new DateTime();
//echo $date->format('Y-m-d H:i:s')

$query = "SELECT timedate, email  FROM mailer";
$result = mysql_query($query);
echo "<table>";
while($row = mysql_fetch_array($result)){
       $tot = $row['timedate'];
       $ema = $row['email'];
    if($tot > $date) {
    //echo "<tr><td>" .$row['timedate']."</td><td>";
    echo"database dates higher then now dates" . "<br>";
    echo "<tr><td>" .$row['email']."</td><td>" ."<br>";
   echo "<tr><td>" .$row['timedate']."</td><td>" ."<br>";
}
else {
    echo"database dates lower then now dates" . "<br>";
    echo "<tr><td>" .$row['email']."</td><td>". "<br>";
       echo "<tr><td>" .$row['timedate']."</td><td>" ."<br>";
}

}
mysql_close();
?>
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这是我得到的测试输出:

database dates …
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php mysql

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