CREATE TABLE table_6246 ("Windows" CLOB, "Mac OS X" CLOB, "Linux" CLOB, "Other Unix" CLOB, "AmigaOS" CLOB, "Android" CLOB, "Windows Mobile" CLOB)

Which Mac OS X has a Linux of no, and an AmigaOS of no, and an Android of unknown?
SELECT "Mac OS X" FROM table_6246 WHERE "Linux" = 'no' AND "AmigaOS" = 'no' AND "Android" = 'unknown'
SELECT "Mac OS X" FROM "table_6246" WHERE "AmigaOS" = 'no' AND "Android" = 'unknown' AND "Linux" = 'no'