How can you ensure that all individual options (e.g., Opt1, Opt2) are displayed separately when using GROUP BY in MySQL queries?

When using GROUP BY in MySQL queries, all individual options (e.g., Opt1, Opt2) may be grouped together if not handled properly. To ensure that each option is displayed separately, you can use the GROUP_CONCAT function along with the GROUP BY clause. This function will concatenate the values of each grouped option into a single string, allowing you to separate them later in your PHP code. 

$query = "SELECT GROUP_CONCAT(option_column SEPARATOR ', ') AS grouped_options FROM your_table GROUP BY group_column";
$result = mysqli_query($connection, $query);

while($row = mysqli_fetch_assoc($result)) {
    $options = explode(', ', $row['grouped_options']);
    
    foreach($options as $option) {
        echo $option . "<br>";
    }
}

Keywords

PHP MySQL GROUP BY DISTINCT SQL queries

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