如何選擇數據庫的所有表mySql並按數據顯示查詢順序，表具有相同的結構

Question

我想做一個新聞欄顯示我需要顯示最后5個查詢，我在同一個數據庫中有5個類別（表），如歷史，自然，生活方式，科學和旅行mySql所有表都具有相同的結構ID，標題，描述，數據，圖片，alt，已批准，我想按數據選擇最后5個訂單，我該怎么做？ 和PHP代碼來顯示查詢

我的代碼用於顯示同一表中按數據顯示的最后5個查詢順序是這個...

$sql = "SELECT id, titlu, link, poza, alt FROM istorie WHERE approved='1' ORDER BY RAND() LIMIT 3";
$query = mysqli_query($db_conx, $sql);
$istorielist = '';
while($row = mysqli_fetch_array($query, MYSQLI_ASSOC)){
    $id = $row["id"];
    $titlu = $row["titlu"];
    $link = $row["link"];
    $poza = $row["poza"];
    $alt = $row["alt"];
    $istorielist .= '<div id="articol-content-more"><a href="/istorie/'.$link.'"><img src="/images/'.$poza.'.jpg"class="articol-content-more-image" alt="'.$alt.'"><p class="articol-content-more-title">'.$titlu.'</p></a><span><a class="articol-content-more-afla" href="/istorie/'.$link.'">Citește mai multe</a></span><span class="articol-content-more-fl"><div class="fb-share-button" data-layout="button_count" data-href="http://esticurios.ro/istorie/'.$link.'"></div></span></div>';
}
?>
<p class="moreArticle">Mai multe articole:<br>
<?php echo $istorielist;?> <br>
<?php mysqli_close($db_conx);?>

Answer 1

您可以將類別數組設為靜態，也可以將所有類別放入一個表中，並動態創建類別數組

<?
$catArray = array("history","nature", "lifestyle", "science","travel");    
$istorielist = '';
foreach($catArray as $k=>$v)
{    
    $sql = "SELECT id, titlu, link, poza, alt FROM ".$v." WHERE approved='1' ORDER BY RAND() LIMIT 3";
    $query = mysqli_query($db_conx, $sql);   
    while($row = mysqli_fetch_array($query, MYSQLI_ASSOC)){
        $id = $row["id"];
        $titlu = $row["titlu"];
        $link = $row["link"];
        $poza = $row["poza"];
        $alt = $row["alt"];
        $istorielist .= '<div id="articol-content-more"><a href="/istorie/'.$link.'"><img src="/images/'.$poza.'.jpg"class="articol-content-more-image" alt="'.$alt.'"><p class="articol-content-more-title">'.$titlu.'</p></a><span><a class="articol-content-more-afla" href="/istorie/'.$link.'">Citește mai multe</a></span><span class="articol-content-more-fl"><div class="fb-share-button" data-layout="button_count" data-href="http://esticurios.ro/istorie/'.$link.'"></div></span></div>';
    } 
}

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