css 希望只显示sql和php中所选值的行[重复]

11dmarpk 于 2022-11-19 发布在 PHP

关注(0)|答案(3)|浏览(139)

此问题在此处已有答案：

MySQL | How to select only one record of each category?（2个答案）
MYSQL Select One Random record from each Category（5个答案）
13个小时前关门了。
我有40个提供商和10，000个产品，但我希望显示每个提供商的1个产品
| 品牌名称|提供者|产品名称|网址|
| - -|- -|- -|- -|
| lightning |实用游戏|命运女神|连接|
| lightning |伊索特贝特|万圣节杰克|连接|
| lightning |实用游戏|甜蜜的富矿|连接|
| lightning |伊索特贝特|热带渤南|连接|
| lightning |内滕|皇家土豆|连接|
| lightning |内滕|命运女神|连接|
因此，这是我的SQL表现在。但我想显示1项的每个供应商，如：
| 品牌名称|提供者|产品名称|网址|
| - -|- -|- -|- -|
| lightning |实用游戏|命运女神|连接|
| lightning |伊索特贝特|万圣节杰克|连接|
| lightning |内滕|皇家土豆|连接|
这是我的密码

<?php
/* Attempt MySQL server connection. Assuming you are running MySQL
server with default setting (user 'root' with no password) */
$link = mysqli_connect("localhost", "newuser1", "p,+Dn@auTD3$*G5", "newdatabse");

// Check connection
if($link === false){
    die("ERROR: Could not connect. " . mysqli_connect_error());
}

// Attempt select query execution
$sql = "SELECT * FROM tablename WHERE Brand='Coolcasino' and Provider IN ('Pragmatic Play','Isoftbet','Netent') ;";
if($result = mysqli_query($link, $sql)){
    if(mysqli_num_rows($result) > 0){
        echo "<table>";
            echo "<tr>";
                echo "<th>Brand</th>";
                echo "<th>Provider</th>";
                echo "<th>Product</th>";
                echo "<th>URL</th>";
            echo "</tr>";
        while($row = mysqli_fetch_array($result)){
            echo "<tr>";
                echo "<td>" . $row['Brand'] . "</td>";
                echo "<td>" . $row['Provider'] . "</td>";
                echo "<td>" . $row['Product'] . "</td>";
                echo "<td>" . $row['URL'] . "</td>";
            echo "</tr>";
        }
        echo "</table>";
        // Close result set
        mysqli_free_result($result);
    } else{
        echo "No records matching your query were found.";
    }
} else{
    echo "ERROR: Could not able to execute $sql. " . mysqli_error($link);
}

// Close connection
mysqli_close($link);
?>

如果有人可以的话，请帮帮我

css

来源：https://stackoverflow.com/questions/74493096/want-to-show-only-row-of-selected-value-with-sql-and-php

3条答案

按热度按时间

atmip9wb1#

有没有可能1个产品随机显示？我的意思是，每次显示第一个产品的瞬间，它会显示不同的产品
使用行号（_N）：

select Brand,
       Provider,
       Product,
       URL
from (   select Brand,
                Provider,
                Product,
                URL,
                row_number() over(partition by Provider order by rand()) as row_num
         from tablename
         where Brand='Lightning' 
         and Provider IN ('Pragmatic Play','Isoftbet','Netent') 
      ) as rand_prod
where row_num=1;

https://dbfiddle.uk/BGzx6cYY

注意 *，我建议不要使用select *，只选择您真正需要的列

赞(0）回复(0）举报 2022-11-19

0yg35tkg2#

将查询替换为

$sql = "SELECT * FROM tablename WHERE Brand='Coolcasino' and Provider IN ('Pragmatic Play','Isoftbet','Netent') GROUP BY  Provider;";

赞(0）回复(0）举报 2022-11-19

gudnpqoy3#

如果你愿意试试这个

$sql = "SELECT * FROM tablename WHERE Brand='Coolcasino' and Provider IN ('Pragmatic Play','Isoftbet','Netent') GROUP BY  Provider, RAND()";

赞(0）回复(0）举报 2022-11-19

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css 希望只显示sql和php中所选值的行[重复]

3条答案

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