SELECT sum(SurfaceArea) FROM country WHERE Continent  =  "Asia" OR Continent  =  "Europe"
What is the total surface area of the continents Asia and Europe?
SELECT sum ( SurfaceArea ) FROM country WHERE Continent = `` Asia '' OR Continent = `` Europe ''
select sum ( surfacearea ) from country where continent = value or continent = value
What is the total surface area of the continents Asia and Europe ?