MySQL Insert Multiple

Last modified on: October 20, 2024

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<h3>MySQL Insert Multiple Rows</h3>
<p>Inserting multiple rows into a MySQL table in a single query can improve performance and simplify your code. You can achieve this using a single <code>INSERT</code> statement.</p>
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<h3>Basic Syntax</h3>
<p>The basic SQL command to insert multiple rows is:</p>
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<pre class="language-php"><code>INSERT INTO table_name (column1, column2, ...)
VALUES 
    (value1a, value2a, ...),
    (value1b, value2b, ...),
    (value1c, value2c, ...);</code></pre>
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<h3>Example of Inserting Multiple Rows</h3>
<p>Here&rsquo;s an example that demonstrates how to insert multiple rows into the <code>users</code> table:</p>
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<pre class="language-php"><code>INSERT INTO users (username, email)
VALUES 
    ('alice', 'alice@example.com'),
    ('bob', 'bob@example.com'),
    ('charlie', 'charlie@example.com');</code></pre>
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<p>This command inserts three new records into the <code>users</code> table.</p>
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<h3>Inserting Multiple Rows Using PHP</h3>
<p>You can also insert multiple rows using PHP with MySQLi or PDO.</p>
<h4>Using MySQLi</h4>
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<pre class="language-php"><code>// Database configuration
$host = 'localhost';
$username = 'root';
$password = 'your_password';
$database = 'your_database';

// Create a connection
$conn = new mysqli($host, $username, $password, $database);

// Check the connection
if ($conn-&gt;connect_error) {
    die("Connection failed: " . $conn-&gt;connect_error);
}

// Insert multiple rows
$sql = "INSERT INTO users (username, email) VALUES 
    ('alice', 'alice@example.com'), 
    ('bob', 'bob@example.com'), 
    ('charlie', 'charlie@example.com')";

if ($conn-&gt;query($sql) === TRUE) {
    echo "New records created successfully";
} else {
    echo "Error: " . $sql . "&lt;br&gt;" . $conn-&gt;error;
}

// Close the connection
$conn-&gt;close();</code></pre>
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<h4>Using PDO</h4>
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<pre class="language-php"><code>// Database configuration
$host = 'localhost';
$username = 'root';
$password = 'your_password';
$database = 'your_database';

try {
    // Create a new PDO instance
    $conn = new PDO("mysql:host=$host;dbname=$database", $username, $password);
    // Set the PDO error mode to exception
    $conn-&gt;setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

// Insert multiple rows
    $sql = "INSERT INTO users (username, email) VALUES 
        ('alice', 'alice@example.com'), 
        ('bob', 'bob@example.com'), 
        ('charlie', 'charlie@example.com')";
    
    $conn-&gt;exec($sql);
    echo "New records created successfully";
} catch (PDOException $e) {
    echo "Error: " . $e-&gt;getMessage();
}

// Close the connection (optional)
$conn = null;</code></pre>
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<h3>Common Issues</h3>
<ol>
<li>
<p><strong>Duplicate Entries</strong>: If you try to insert duplicate values into a column with a unique constraint, you'll encounter an error. Consider using <code>INSERT IGNORE</code> to skip duplicates or <code>ON DUPLICATE KEY UPDATE</code> to handle them.</p>
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<li>
<p><strong>Data Type Mismatches</strong>: Ensure that the values you are inserting match the data types defined in the table schema.</p>
</li>
<li>
<p><strong>Maximum Packet Size</strong>: If you attempt to insert a very large number of rows, you may hit the maximum packet size allowed by MySQL. Adjust the <code>max_allowed_packet</code> setting in your MySQL configuration if necessary.</p>
</li>
</ol>
<hr />
<h3>Best Practices</h3>
<ul>
<li>
<p><strong>Batch Inserts</strong>: When dealing with a large number of rows, consider batching your inserts into groups to optimize performance and reduce the load on the server.</p>
</li>
<li>
<p><strong>Prepared Statements</strong>: For user-provided data, use prepared statements to prevent SQL injection and enhance security.</p>
</li>
</ul>
<h4>Example with Prepared Statements (MySQLi)</h4>
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<pre class="language-php"><code>$stmt = $conn-&gt;prepare("INSERT INTO users (username, email) VALUES (?, ?)");
$stmt-&gt;bind_param("ss", $username, $email);

// Example data array
$data = [
    ['alice', 'alice@example.com'],
    ['bob', 'bob@example.com'],
    ['charlie', 'charlie@example.com']
];

foreach ($data as $user) {
    $username = $user[0];
    $email = $user[1];
    $stmt-&gt;execute();
}

echo "New records created successfully";
$stmt-&gt;close();</code></pre>
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<h4>Example with Prepared Statements (PDO)</h4>
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<pre class="language-php"><code>$stmt = $conn-&gt;prepare("INSERT INTO users (username, email) VALUES (:username, :email)");

// Example data array
$data = [
    ['username' =&gt; 'alice', 'email' =&gt; 'alice@example.com'],
    ['username' =&gt; 'bob', 'email' =&gt; 'bob@example.com'],
    ['username' =&gt; 'charlie', 'email' =&gt; 'charlie@example.com']
];

foreach ($data as $user) {
    $stmt-&gt;execute($user);
}

echo "New records created successfully";</code></pre>
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<h3>&nbsp;</h3>
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