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..................................................................................................................................... prepare("
SELECT
sa.id AS attempt_id,
sa.total_obtained,
sa.total_possible,
sa.submitted_at,
s.student_name,
s.admission_no,
s.course
FROM student_attempts sa
LEFT JOIN students s ON sa.student_id = s.id
WHERE sa.assignment_id = ? AND sa.submitted_at IS NOT NULL
ORDER BY sa.total_obtained DESC
");
$q->execute([$assignment_id]);
$rows = $q->fetchAll(PDO::FETCH_ASSOC);
?>
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