Xor en SQL Server
SELECT name
, population
, area
FROM world
WHERE (area > 3000000 AND population <= 250000000)
OR (area <= 3000000 AND population > 250000000)
Lux
SELECT name
, population
, area
FROM world
WHERE (area > 3000000 AND population <= 250000000)
OR (area <= 3000000 AND population > 250000000)