How can you ensure that only one instance of a specific value is displayed in a PHP query result?

To ensure that only one instance of a specific value is displayed in a PHP query result, you can use the DISTINCT keyword in your SQL query. This will filter out duplicate values and only display unique values for the specified column. 

<?php
// Establish a connection to the database
$connection = new mysqli("localhost", "username", "password", "database");

// Check connection
if ($connection->connect_error) {
    die("Connection failed: " . $connection->connect_error);
}

// Query to select unique values for a specific column
$sql = "SELECT DISTINCT column_name FROM table_name";

$result = $connection->query($sql);

if ($result->num_rows > 0) {
    // Output data of each row
    while($row = $result->fetch_assoc()) {
        echo "Value: " . $row["column_name"] . "<br>";
    }
} else {
    echo "0 results";
}

$connection->close();
?>

Keywords

PHP query result unique distinct

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