Question: Show the accelerator names and supporting operating systems that are not compatible with the browser named 'Opera'.
Schema: create table browser (id varchar, name varchar, PRIMARY KEY (id)); create table web_client_accelerator (name varchar, operating_system varchar, PRIMARY KEY (name)); create table accelerator_compatible_browser (accelerator_id varchar, browser_id varchar, PRIMARY KEY (accelerator_id)); create table web_client_accelerator (name varchar, operating_system varchar, id varchar, PRIMARY KEY (name))
SQL: 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'