Create SQL query for Wordpress Multisite - php

Question

I'm trying to create a SQL query for a Wordpress multisite. I just don't get an answer.
The multisite has an id of 2 and the table is also named 2. Can someone help my with it?
If I change wp_2_posts, wp_2_postmeta to wp_posts, wp_postmeta, then it will work but only for the multisite with id = 1. I try a lot but not correct result.
<table class="tg">
<tr>
<th colspan="4" class="tg-dqty"> <b>Vandaag: <?=$date?> <!–– automatic date ––> </b>
</th>
</tr>
<tr>
<td class="tg-apa9">Datum/Tijd</td>
<td class="tg-apa9">De klant</td>
<td class="tg-apa9">Kapper</td>
<td class="tg-apa9">Betaling</td>
</tr>
<?php
$query_res = "SELECT * FROM wp_2_posts as wp,wp_2_postmeta as wpm,wp_blogs as blg WHERE wp.ID=wpm.post_id and wpm.meta_key='_sln_booking_date' and wpm.meta_value='$date' and blg.blog_id='2'";
$results_d = $wpdb->get_results($query_res);
foreach($results_d as $resultsd)
{
$post_id = $resultsd->ID;
$first_name = get_post_meta($post_id, '_sln_booking_firstname', true);
$last_name = get_post_meta($post_id, '_sln_booking_lastname', true);
$date = get_post_meta($post_id, '_sln_booking_date', true);
$time = get_post_meta($post_id, '_sln_booking_time', true);
$services = get_post_meta($post_id, '_sln_booking_services', true);
$attendants = array();
foreach($services as $service)
{
$attendants[] = $service['attendant'];
}
$attendants = array_unique($attendants);
$attendant_names = '';
if(count($attendants) > 0)
{
$attendants = implode(',', $attendants);
$query_res = "SELECT post_title FROM `wp_2_posts`, `wp_blogs`
WHERE post_type='sln_attendant' AND ID IN ($attendants) AND blg.blog_id = '2'";
$results_a = $wpdb->get_results($query_res);
$disattendants = array();
foreach($results_a as $result)
{
$disattendants[] = $result->post_title;
}
$attendant_names = implode(',', $disattendants);
//print_r($results);
}
$status = $resultsd->post_status;
$statuses = array('sln-b-paid'=>'Betaald','sln-b-paylater'=>'Betaal later','sln-b-canceled'=>'Geannuleerd','sln-b-confirmed'=>'Bevestigd');
$classes = array('sln-b-paid'=>'tg-jsol','sln-b-paylater'=>'tg-8a9r','sln-b-canceled'=>'tg-jsolc','sln-b-confirmed'=>'tg-jsol');
?>
<tr>
<td class="<?=$classes[$status]?>">Om <?=$time?> uur<br><?=$date?></td>
<td class="<?=$classes[$status]?>"><?=$first_name?> <?=$last_name?></td>
<td class="<?=$classes[$status]?>"><?=$attendant_names?></td>
<td class="<?=$classes[$status]?>"><?=$statuses[$status]?></td>
</tr>
<?php
}
?>
</table>