Fatal error: Uncaught ArgumentCountError: mysqli_query()

selamat malam

saat saya coba jalan kan website muncul pesan eror:

Fatal error: Uncaught ArgumentCountError: mysqli_query() expects at least 2 arguments, 1 given in C:\xampp\htdocs\wisatasia\sumbar.php:57 Stack trace: #0 C:\xampp\htdocs\wisatasia\sumbar.php(57): mysqli_query('SELECT * FROM s...') #1 {main} thrown in C:\xampp\htdocs\wisatasia\sumbar.php on line 57

berikut kode halaman : sumbar.php

<legend class="text-right"><h2><?php echo $is; ?> Jawa Timur</h2></legend>

                        <?php

$comot= mysqli_query("SELECT * FROM setup_sumbar where kat_sumbar='$_GET[post]'");

while($ngisi= mysql_fetch_array($comot)){

if ($ngisi['judul_sumbar']!=""){

?>

<div class="span4">

<legend><h3><?php echo $ngisi['judul_sumbar']; ?></h3></legend>

</div>

<?php

}

echo $ngisi['konten_sumbar'];

echo "<br />";

}

?>