CREATE TABLE table_11857 ("Client" CLOB, "Windows" CLOB, "GNU/Linux" CLOB, "Mac OS X" CLOB, "Haiku" CLOB)

Which client had no GNU/Linux?
SELECT "Client" FROM table_11857 WHERE "GNU/Linux" = 'no'
SELECT "Client" FROM "table_11857" WHERE "GNU/Linux" = 'no'