如何在另一个表的一行中传递一个表的ID？

Question

我正在生成一些足球器材，我想做的就是将这些器材和比赛插入两张桌子。 夹具表是不错的选择，但是我很难在“匹配”表中插入匹配项，因为该表具有“夹具”表的外键。

夹具表

id_fixture unsigned bigint(20)
fixture bigint(20)

比赛桌

id_match unsigned bigint(20)
fixture bigint(20) -> foreign key to fixture.id_fixture
homeTeam varchar(191)
awayTeam varchar(191)

PHP算法

$i = 1;
foreach ($games as $rounds) {
    $free = "";
    echo "<h5>Etapa {$i}</h5>";
    $SQL1 = "INSERT INTO `fixture` (`id_fixture`, `fixture`) VALUES (NULL, '$i');";
    $query1 = $link->query($SQL1);
    foreach ($rounds as $match) {
        if ($match[0] == "stă etapa asta.") {
            $free = "<span style='color:red;'>{$match[1]} {$match[0]}</span><br>";
            $SQL2 = "INSERT INTO `match` (`id_match`, `fixture`, `homeTeam `, `awayTeam `) VALUES (NULL, '$match[1]', '$match[0]');";
            $query2 = $link->query($SQL2);
        } elseif ($match[1] == "stă etapa asta.") {
            $free = "<span style='color:red;'>{$match[0]} {$match[1]}</span><br>";
            $SQL3 = "INSERT INTO `match` (`id_match`, `fixture`, `homeTeam `, `awayTeam `) VALUES (NULL, '$match[0]', '$match[1]');";
            $query3 = $link->query($SQL3);
        } else {
            echo "{$match[0]} vs {$match[1]}<br>";
            $SQL4 = "INSERT INTO `match` (`id_match`, `fixture`, `homeTeam `, `awayTeam `) VALUES (NULL, '$match[0]', '$match[1]');";
            $query4 = $link->query($SQL4);
        } 
    }
    echo $free;
    echo "<br>";
    $i++; 
}
mysqli_close($link);

生成游戏时，如何将fixture.id_fixture传递给match.fixture？

Answer 1

您可以使用$link->insert_id 。

$i = 1;
foreach ($games as $rounds) {
    $free = "";
    echo "<h5>Etapa {$i}</h5>";
    $stmt = $link->prepare('INSERT INTO fixture (fixture) VALUES (?)');
    $stmt->bind_param('i', $i);
    $stmt->execute();
    $id_fixture = $link->insert_id; // The auto generated ID
    foreach ($rounds as $match) {
        if ($match[0] == "stă etapa asta.") {
            $free = "<span style='color:red;'>{$match[1]} {$match[0]}</span><br>";
            $stmt = $link->prepare('INSERT INTO `match` (fixture, homeTeam, awayTeam) VALUES (?, ?, ?)');
            $stmt->bind_param('iss', $id_fixture, $match[1], $match[0]);
            $stmt->execute();
        } elseif ($match[1] == "stă etapa asta.") {
            $free = "<span style='color:red;'>{$match[0]} {$match[1]}</span><br>";
            $stmt = $link->prepare('INSERT INTO `match` (fixture, homeTeam, awayTeam) VALUES (?, ?, ?)');
            $stmt->bind_param('iss', $id_fixture, $match[0], $match[1]);
            $stmt->execute();
        } else {
            echo "{$match[0]} vs {$match[1]}<br>";
            $stmt = $link->prepare('INSERT INTO `match` (fixture, homeTeam, awayTeam) VALUES (?, ?, ?)');
            $stmt->bind_param('iss', $id_fixture, $match[0], $match[1]);
            $stmt->execute();
        }
    }
    echo $free;
    echo "<br>";
    $i++;
}

我从您的查询中删除了ID列，因为我假设它们都是自动生成的ID，在这种情况下，您不需要为每个参数传递NULL。