Fatal error: Uncaught mysqli_sql_exception: Unknown column 'employee_id' in 'field list' in /home/aozukhqf/public_html/backends/@class_teacher/login.php:48 Stack trace: #0 /home/aozukhqf/public_html/backends/@class_teacher/login.php(48): mysqli->query('SELECT DISTINCT...') #1 {main} thrown in /home/aozukhqf/public_html/backends/@class_teacher/login.php on line 48