When I query the database data, an error message appears. How can I solve it?

Question

1. Controller interface

public function demo(){
dump("Test whether the control can be accessed");
$sql = 'SELECT * FROM `user` ';
dump("Test whether the sql statement is wrong");
$res = Db::query($sql);

var_dump($res);

2 , error message

could not find driver

##}

Answer 1

There is no database driver. Are you sure your database link is correct?