CREATE TABLE table_68331 ("Sydney" TEXT, "Melbourne" TEXT, "Perth" TEXT, "Adelaide" TEXT, "Gold Coast" TEXT, "Auckland" TEXT)

Which Sydney's Melbourne was no, when Auckland was yes?
SELECT "Sydney" FROM table_68331 WHERE "Melbourne" = 'no' AND "Auckland" = 'yes'
SELECT "Sydney" FROM "table_68331" WHERE "Auckland" = 'yes' AND "Melbourne" = 'no'