Question

正如主题所说，添加两个数据库列哇显示结果为ORDER BY DESC LIMIT 20

在这里，我得到了一个效果很好的代码，它显示了前20名富有玩家的结果。

<div class="container div-table" style="padding-top:3%">
     <div class="parallax-bg" data-stellar-background-ratio="0.5" data-stellar-vertical-offset="-150"></div>
     <div class="parallax-overlay"></div>
     <div class="parallax-inner text-center">
     <div class="col-sm-4 col-md-11 feature">

           <div class="media-object fa fa-usd"></div>
           <div class="media-body">
                 <h4 class="media-heading">Top 20 Richest Players</h4>
           </div>
     </div>
    <table class="table table-bordered">
        <thead>
                <td><h5>Rank</h5></td>
                <td><h5>Username</h5></td>
                <td><h5>Money</h5></td>
                <td><h5>Last Login</h5></td>
        </thead>
        <?php
            $query = $koneksi->prepare("SELECT `user`, `money`, `LastOnlineDate` FROM `playerdata` WHERE `banned`=0 ORDER BY `money` DESC LIMIT 20");
            $query->execute();
            if($query->rowCount() == 0)
            {
                echo "<tr><td colspan='6'><small>No rows found</small></td></tr>";
            }
                $dollar = 0;
                while($data = $query->fetch())
                {
                    $dollar++;
                    echo "<tr><td>".$dollar."</td>";
                    echo "<td>".$data['user']."</td>";
                    echo "<td>".$data['money']."</td>";
                    echo "<td>".$data['LastOnlineDate']."</td></tr>";
                }
            ?>
        </table>
   </div>
</div>

正如您所看到的那样，它只显示money，但我想显示添加Bank列的结果。

我已尝试过这段代码，即使它是愚蠢的

$query = $koneksi->prepare("SELECT `user`, `money`, `Bank`, `LastOnlineDate` FROM `playerdata` WHERE `banned`=0 ORDER BY `money` + `Bank` DESC LIMIT 20");

Answer 1

要在sql中添加两列，请使用加号。

select money + bank as total
, etc
order by total desc

Answer 2

我认为 CONCAT（）就是你要找的：

SELECT CONCAT(`money`, '', `Bank`), etc FROM `playerdata` ...

如何添加两个数据库列将显示结果

2 个答案: