如何在两个不同的mySQL表中存储相同的数据? - How can I store the same data in two different mySQL tables?

How can I store the same data in two different mySQL tables?

本文关键字：mySQL 存储数据两个 | 更新日期: 2023-09-27

当新客户端购买产品时，我想将客户端详细信息存储在clients表中，并将相应的client_ID存储在orders表中。

订单表:

order_ID   product   client   
============================
 1501      bag         1
 1502      shoe        2

客户表:

client_ID   name      
=================
   1       Frank         
   2       John

我找到了一个解决方案，它是有效的，但我有一种感觉，这不是最聪明的解决方案。

$sql = "INSERT INTO clients(name) VALUES(?)";
$q = $con->prepare($sql);
$q->execute(array($name));
$sql = "INSERT INTO orders(product) VALUES(?)";
$q = $con->prepare($sql);
$q->execute(array($product));
$sql = 'SELECT * FROM clients ORDER BY client_ID DESC LIMIT 0, 1';
foreach ($con->query($sql) as $row) {
    $client = $row['client'];
    $sql = "UPDATE orders SET client = '$client' WHERE client IS NULL";
    $query = $con->prepare($sql);
    $query->execute();
}

我的问题是，有没有更好的方法来做到这一点?(备注:client_ID是AUTO_INCREMENT)

获取插入数据库的最后一个id:

$sql = "INSERT INTO clients(name) VALUES(?)";
$q = $con->prepare($sql);
$q->execute(array($name)); 
// Assuming you use PDO:
$clientId = $con->lastInsertId();
// For mysqli this would be:
// $clientId = $con->insert_id;

$sql = "INSERT INTO orders(product, client) VALUES(?, ?)";
$q = $con->prepare($sql);
$q->execute(array($product, $clientID));