Merge Data Tables in PHP: Quick Guide

1 year ago
Liam
2 minutes

To merge multiple data tables, you can follow these steps:

  1. Connect to the database: First, use PHP to connect to the database, either through PDO or mysqli.
  2. Search the database: Search multiple data tables that need to be merged, and retrieve the data from the tables.
  3. Merge tables: Combine the queried tables into one dataset, using data structures such as arrays in PHP to store the merged data.
  4. Process data: Manipulate the merged data as necessary, such as sorting, filtering, etc.

Here is a simple example code:

<?php
// 连接数据库
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "dbname";

$conn = new mysqli($servername, $username, $password, $dbname);

// 查询数据表
$sql1 = "SELECT * FROM table1";
$result1 = $conn->query($sql1);

$sql2 = "SELECT * FROM table2";
$result2 = $conn->query($sql2);

// 合并数据表
$data = array();

if ($result1->num_rows > 0) {
    while ($row = $result1->fetch_assoc()) {
        $data[] = $row;
    }
}

if ($result2->num_rows > 0) {
    while ($row = $result2->fetch_assoc()) {
        $data[] = $row;
    }
}

// 处理数据
// 对$data进行排序、过滤等操作

// 输出合并后的数据
print_r($data);

// 关闭数据库连接
$conn->close();
?>

In this example, we start by connecting to the database, then query two data tables, table1 and table2, and combine them into an array $data. Finally, we process and output the merged data. If there are more data tables to merge, you can continue following this procedure.

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