Error in code, what's the problem?

Question

PHP

I'm doing mysql + php lesson, but the following error occurs: Warning: mysqli_query() expects at least 2 parameters, 1 given in C:\OpenServer\domains\test\mysql.php on line 10
Here is the code, I can't understand what error, I paste the code from the lesson, the same thing:

<?php

$link = mysqli_connect('localhost', "root", '', 'test');
if ( !$link ) die("Error");

$query = 'CREATE TABLE users(
    login       VARCHAR(20),
    password    VARCHAR(20)
)';
mysqli_query($query);

mysqli_close($link);
?>

Answer 1

the error says it all.
we open the dock by function and are surprised to find that we need 2 parameters, but in your code there is only one.

Answer 2

Try mysqli_query($link, $query);
Features of php7 and mysqli