Question

我找了大约一个小时。我甚至可能在寻找错误的东西，因为我确信这是一种常见的做法。在过去，我本来只是运行多个查询或者有硬编码的东西，但我正在尝试以最有效的方式做事。

我有一个带回这些数据的查询：

factoryId | serviceID | serviceName
    1         1001        repair
    1         1002        recycle
    1         1003        transfer
    2         1001        repair
    2         1002        recycle
    2         1003        transfer
    3         1001        repair
    3         1002        recycle
    3         1003        transfer

我需要将其放入带标题的部分...... // switch语句从id确定工厂名称？＆gt; 工厂一

修复
回收
转移

工厂二

修复
回收
转移

工厂三

修复
回收
转移

我认为解决方案是使用多维数组，但不确定如何编写数组，然后（2 foreach循环？）来回显格式化结果。

Answer 1

这是你可以做的，我没有使用查询但是生成了一个类似于mysql_fetch_assoc（）的数组;

<?php
$array[] = array("factory"=>"Factory One","serviceName"=>"repair");
$array[] = array("factory"=>"Factory One","serviceName"=>"recycle");
$array[] = array("factory"=>"Factory One","serviceName"=>"transfer");
$array[] = array("factory"=>"Factory Two","serviceName"=>"repair");
$array[] = array("factory"=>"Factory Two","serviceName"=>"recycle");
$array[] = array("factory"=>"Factory Two","serviceName"=>"transfer");
$array[] = array("factory"=>"Factory three","serviceName"=>"repair");
$array[] = array("factory"=>"Factory three","serviceName"=>"recycle");
$array[] = array("factory"=>"Factory three","serviceName"=>"transfer");

$group_array = array();
foreach($array as $key=>$val){
    $group_array[$val["factory"]][] = $val["serviceName"];
}

foreach($group_array as $key=>$val){
    echo '<b>'.$key.'</b><br />';
    foreach($val as $k=>$v){
        echo '-'.$v.'<br />';
    }
}
?>

第一个循环类似于循环查询结果并创建一个组数组，然后最终循环组数组以显示数据。

Answer 2

尝试以下代码。确保将查询附加ASC或DESC写入 factoryID

<?php

//Place a counter for factoryId

$countid_fid = 1;
$reset = 0; //this decides if the title should be printed or not. 1 means dont print.
//loop 

while($row = mysql_fetch_object($q)) {

    $fid = $row->factoryID;

    if($countid_fid == $fid) {
        if($reset = 0) {            
            echo $row->serviceName; //title
            $reset = 1;
        }       
    }else{
        $reset = 0; 
    }
    //rest of your code to show data



}


?>

Answer 3

希望这个帮助

SELECT * FROM factory GROUP BY factoryId;

尝试从单个mysql查询中排序和显示数据

3 个答案: