SELECT * from system_info WHERE NOT EXISTS (SELECT * FROM processes WHERE name LIKE "%auditd%");
is used to return a single row of data for any device which does not have the desired process running. You could just as easily write:
If you instead wrote
SELECT 1 WHERE NOT EXISTS (SELECT * FROM processes WHERE name LIKE 'auditd%');
it would just return a giant list of the running processes for every device not running auditd, which doesn't sound like the goal you stated initially.
select * from processes