CREATE TABLE table_204_490 (id DECIMAL, "position" TEXT, "name" TEXT, "height" TEXT, "weight" TEXT, "birthdate" TEXT, "birthplace" TEXT, "2009-10 team" TEXT)

who is the tallest player born in july ?
SELECT "name" FROM table_204_490 WHERE "birthdate" = 7 ORDER BY "height" DESC LIMIT 1
SELECT "name" FROM "table_204_490" WHERE "birthdate" = 7 ORDER BY "height" DESC NULLS LAST LIMIT 1