每天添加的mysql计数记录

我是mysql新手。我想知道如何输出每天有多少条记录被添加到一个表中

此数据

loggedID datelogged 1 2015-10-03 2 2015-10-03 3 2015-10-05 4 2015-10-05 5 2015-10-06 6 2015-10-06 7 2015-10-06 日志记录 1 2015-10-03 2 2015-10-03 3 2015-10-05 4 2015-10-05 5 2015-10-06 6 2015-10-06 7 2015-10-06 将输出

2015-10-03 2 2015-10-04 0 2015-10-05 2 2015-10-06 3 2015-10-03 2 2015-10-04 0 2015-10-05 2 2015-10-06 3

---

提前感谢

我不知道单用SQL怎么做，所以我用了一点PHP。输出将转到图形。这就是为什么我需要没有记录呼叫的日期显示为0

SELECT datelogged, COUNT(*)
FROM your_table
GROUP BY datelogged

<?php

    # Open the database
    require 'config.php';     
    require 'database_connect.php';

        function datediff($date1) {
                $date2 = "2015-09-14";
                $date1 = date_create($date1);
                $date2 = date_create($date2);
                $diff=date_diff($date1,$date2);
                $realdiff = $diff->format("%a");
                return $realdiff;
        }

    $query = "select datelogged, count(*) as daycalls from rti_loggedcalls group by datelogged";

    try
    {
        $sth = $db->query($query);
        while ($row = $sth->fetch (PDO::FETCH_ASSOC))
        {
        $date = ($row["datelogged"]);
        $mdate = datediff($date);
        $output[$mdate] = ($row["daycalls"]);
        } 
    }

    catch (PDOException $e)
    {
        printf("We had a problem: %s\n", $e->getMessage());
    }


    for ($i = 0; $i < ($mdate + 1) ; $i++) {
        echo $i." ".(0 + $output[$i])."<br>";
    }
?>

该去读SQL教程了。这是非常基本的东西。答案很接近，但输出中没有“2015-10-04 0”。