过去几天我学到了很多东西，但弄清楚如何排除重复记录让我感到困惑......
使用标题搜索按钮搜索“abba” 返回 2 个结果
请注意，它是在不同光盘上的重复项。
如何只显示第一个找到的内容？ 这只是 1 个例子:有数百个重复项，这是正常的。它们只是不同的光盘集。然而，Sound Choice 和 DKKaraoke 是不同的唱片公司，并非重复。因此，仅当光盘 ID 以相同代码开头时才重复 - 即 DK088 和 DK056 是骗局，但如果艺术家和标题相同，则 DK088 和 SC5101 不是骗局...或者比较品牌可能更容易。
这是我当前的代码:
<?php
include("connect.php");
require_once 'Mobile_Detect.php';
$detect = new Mobile_Detect;
ini_set('session.cookie_lifetime',900);
ini_set('session.gc_maxlifetime',900);
session_start();
if(isset($_POST['searchbtn'])) { $_SESSION['searchterm']=$_POST['searchterm']; }
?>
<html>
<head>
<title>1KaraokeDJ.com Search</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="style.css" />
</head>
<body>
<div class="container">
<form method="post">
<p><code>
<img src="top1.jpg" /><br>
<?php if ($detect->isMobile()) { echo("Mobile Device Detected"); } else { echo("Desktop Browser Detected"); } ?>
</code></p>
<p>
<?php if(isset($_SESSION['searchterm'])) { ?>
<input name="searchterm" type="search" value="<?php echo $_SESSION['searchterm'];?>" class="search" />
<?php } else { ?>
<input name="searchterm" type="search" placeholder="Enter Search Terms Here" class="search" />
<?php } ?>
</p>
<p>
<input name="searchbtn" type="submit" id="searchbtn" class="hiddenbutton" value="Karaoke Search" />
<input name="searchbtn" type="submit" id="searchbtn" class="searchbutton" value="Artist Search" />
<input name="searchbtn" type="submit" id="searchbtn" class="searchbutton" value="Title Search" />
<input name="searchbtn" type="submit" id="searchbtn" class="searchbutton" value="Disc ID Search" />
</p>
<hr style="width:100%">
<?php if(isset($_SESSION['searchterm'])) {
if(($_SESSION['searchterm']!="")) {
$searchterm=strtoupper($_SESSION['searchterm']);
switch ($_POST['searchbtn']) {
case 'Karaoke Search':
$searchresults=$db->query("select * from 1KaraokeDJ where Artist like '%$searchterm%' || Title like '%$searchterm%' || Disc like '%$searchterm%' order by Artist, Title limit 100");
break;
case 'Artist Search':
$searchresults=$db->query("select * from 1KaraokeDJ where Artist like '%$searchterm%' order by Title, Disc limit 100");
break;
case 'Title Search':
$searchresults=$db->query("select * from 1KaraokeDJ where Title like '%$searchterm%' order by Artist, Disc limit 100");
break;
case 'Disc ID Search':
$searchresults=$db->query("select * from 1KaraokeDJ where Disc like '%$searchterm%' limit 100");
break;
}
if(mysqli_num_rows($searchresults) > 0) {
while($descri=mysqli_fetch_object($searchresults)) { ?>
<div class="reslt">
<h3 id="results">
<?php
echo str_ireplace($searchterm, '<span class="highlight">'.$searchterm."</span>", $descri->Artist);
echo " - ";
echo str_ireplace($searchterm, '<span class="highlight">'.$searchterm."</span>", $descri->Title);
?>
</h3>
<p class="Description">
<?php
echo $descri->Brand; echo " - ";
echo str_ireplace($searchterm, '<span class="highlight">'.$searchterm."</span>", $descri->Disc);
echo " - "; echo $descri->Track;
?>
</p>
<hr>
</div>
<?php } ?>
<div class="reslt">
<h3 id="results"><?php echo mysqli_num_rows($searchresults) ?> Results</h3>
<?php if(mysqli_num_rows($searchresults) >= 100) { ?>
<p class="Description highlight">Showing Up To 100 Results<br>Try Refining Your Search</p>
<?php } ?>
</div>
<?php } else { ?>
<div class="reslt">
<h3 id="results">Nothing Found!</h3>
<p class="Description highlight">Try Changing Your Search Terms<p>
<?php if ($_POST['searchbtn'] == "Disc ID Search" ) { ?>
Chartbuster = CBxxx<br>
DKKaraoke = DKxxx<br>
Karaoke Hits = KHxxx<br>
Sound Choice = SCxxx<br>
Sunfly = SFxxx
<?php } ?>
</div>
<?php }
} } ?>
</form>
<hr>
<code>© D & C Entertainment 2003 - 2015</code>
</div>
</body>
</html>
最佳答案
尝试使用
SELECT DISTINCT discId FROM youTable WHERE itMatchsYourField ORDER BY artist
这只会返回您唯一的 DiscId
所以你最终不会得到两次相同的 DK。现在在您的示例中您有 2 个 DKXXX
由于只有 2 个首字母，您应该使用类似
SELECT DISTINCT LEFT(discId , 2) FROM yourTable
这样你就不会得到两次DK，你会得到SC或DK以及第一个出现的
关于php - 排除 MySQLi Select/Like 搜索中的重复返回，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/33727204/