Fatal error: Uncaught mysqli_sql_exception: Unknown column 'contact' in 'where clause' in /home/ubuntu/public_html/ai/AppCode/Connection.php:17 Stack trace: #0 /home/ubuntu/public_html/ai/AppCode/Connection.php(17): mysqli_query() #1 /home/ubuntu/public_html/ai/AppCode/Healthcare.php(121): Connection->Query() #2 /home/ubuntu/public_html/ai/include/healthcare-doctor.php(15): Healthcare->GetDoctorsById() #3 /home/ubuntu/public_html/ai/index.php(402): include_once('...') #4 {main} thrown in /home/ubuntu/public_html/ai/AppCode/Connection.php on line 17