Which accelerator ids are not compatible with Opera?
select id from web_client_accelerator where id not in (select t1.accelerator_id from accelerator_compatible_browser as t1 join browser as t2 on t1.browser_id = t2.id where t2.name = 'Opera')
For these, show the names and supporting operating systems.
select name, operating_system from web_client_accelerator except select t1.name, t1.operating_system from web_client_accelerator as t1 join accelerator_compatible_browser as t2 on t2.accelerator_id = t1.id join browser as t3 on t2.browser_id = t3.id where t3.name = 'Opera'