Context: CREATE TABLE browser (id VARCHAR, name VARCHAR); CREATE TABLE web_client_accelerator (name VARCHAR, operating_system VARCHAR); CREATE TABLE accelerator_compatible_browser (accelerator_id VARCHAR, browser_id VARCHAR); CREATE TABLE web_client_accelerator (name VARCHAR, operating_system VARCHAR, id VARCHAR)
Question: Show the accelerator names and supporting operating systems that are not compatible with the browser named 'Opera'.
Answer: 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'