CREATE TABLE table_203_834 (id DECIMAL, "rank" DECIMAL, "census subdivision" TEXT, "province" TEXT, "type" TEXT, "land area\ ( km2 ,  2011 ) " DECIMAL, "population 2011" DECIMAL, "population 2006" DECIMAL, "population 2001" DECIMAL, "population 1996" DECIMAL, "change in % 2006-2011" DECIMAL, "change in % 1996-2011" DECIMAL)

which province has the most population on the table ?
SELECT "province" FROM table_203_834 GROUP BY "province" ORDER BY SUM("population 2011") DESC LIMIT 1
SELECT "province" FROM "table_203_834" GROUP BY "province" ORDER BY SUM("population 2011") DESC NULLS LAST LIMIT 1