Eventyret on "Help with $wpdb"

Tried something new but it seems this gives me an error.

<?php
$current_user = wp_get_current_user();
$brukernavn = $wpdb->get_var(wpdb->prepare("SELECT FROM wp_iphorm_form_entry_data WHERE 'brukernavn' ;");
$fish_countp = $wpdb->get_var($wpdb->prepare("SELECT COUNT(*) FROM wp_iphorm_form_entry_data WHERE value LIKE 'Registrere fisk' ;"));
if ($x=='$current_user' && $y=='$brukernavn'){
echo "Brukeren $brukernavn har $fish_countp totalt"
}else {
//do otherwise
}
?>

Any help please ?