CREATE TABLE table_203_222 (id NUMBER, "category" CLOB, "#" NUMBER, "name" CLOB, "hanzi" CLOB, "hanyu pinyin" CLOB, "population  ( 2010 census ) " NUMBER, "area  ( km2 ) " NUMBER, "density  ( /km2 ) " NUMBER)

what is the difference in population between enping and heshan ?
SELECT ABS((SELECT "population (2010 census)" FROM table_203_222 WHERE "name" = 'enping') - (SELECT "population (2010 census)" FROM table_203_222 WHERE "name" = 'heshan'))
SELECT ABS((SELECT "population (2010 census)" FROM "table_203_222" WHERE "name" = 'enping') - (SELECT "population (2010 census)" FROM "table_203_222" WHERE "name" = 'heshan'))