Are there any potential pitfalls to be aware of when using PHP to format and display grouped data from a MySQL query?

One potential pitfall when using PHP to format and display grouped data from a MySQL query is not properly handling the data structure returned by the query. It's important to iterate through the grouped data and format it correctly for display, such as using nested loops to access each group and its corresponding data. Additionally, be mindful of any potential performance issues that may arise from processing large amounts of grouped data. 

// Assuming $result contains the grouped data from a MySQL query
foreach ($result as $group) {
    echo "<h2>{$group['group_name']}</h2>";
    
    foreach ($group['data'] as $data) {
        echo "<p>{$data['column_name']}</p>";
    }
}

Keywords

PHP MySQL data formatting group by error handling

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