计算相同的数据库条目/mysqli_num_rows答案

【问题标题】：Counting database entries that are the same/mysqli_num_rows计算相同的数据库条目/mysqli_num_rows
【发布时间】：2016-02-18 00:32:45
【问题描述】：

似乎在任何地方都没有类似的问题。我需要这个来遍历每个唯一值，然后踢出有多少是相同的，但是，不知何故我使用 mysqli_num_rows 错误。提前谢谢你。

//This portion fetches unique entries that aren't empty
$query = "SELECT DISTINCT burger ";
$query .= "FROM newbob ";
$query .= "WHERE burger != '' ";
$query .= "ORDER BY burger ASC ";


$result = mysqli_query($dbc, $query);
if (!$result){
    die ("Database query failed.");
}

//and I want this portion to count how many there are that are the same, and
//just add it next to it.
while($entries = mysqli_fetch_assoc($result)) {
echo $entries["burger"];
$query2 = "SELECT burger ";
$query2 .= "FROM newbob ";
$query2 .= "WHERE burger = '$entries[burger]'";
$result2 = mysqli_query($dbc, $query2);
$rowcount = mysqli_num_rows($result2);

echo "( " . $rowcount . " )<br>";
}

编辑：我的查询以某种方式失败，我修复了查询中的空格，但是我想知道我是否对查询的 $entries[burger] 部分做错了。

Edit2：可能会坐在这里，自己打字！我只需要一些单引号。现在，当它击中撇号时，我失败了。有什么想法吗？

【问题讨论】：

标签： count unique counting

【解决方案1】：

是的，我刚刚完成了它。它不一定漂亮，但我不知道如何做得更好。新的底部是

//and I want this portion to count how many there are that are the same, and
//just add it next to it.
while($entries = mysqli_fetch_assoc($result)) {
echo stripslashes($entries["burger"]);
 foreach ($entries as $entries) {
            $entries2 = mysqli_real_escape_string($dbc,$entries); }
            $query2 = "SELECT burger ";
            $query2 .= "FROM newbob ";
            $query2 .= "WHERE burger = '$entries2'";
            $result2 = mysqli_query($dbc, $query2);
                            if (!$result2){
    die ("<br>Database query failed.");
}
            $rowcount = mysqli_num_rows($result2);

           echo "( " . $rowcount . " )<br>";
 }

【讨论】：