CREATE TABLE table_203_226 (id DECIMAL, "player" TEXT, "matches" DECIMAL, "innings" DECIMAL, "not out" DECIMAL, "runs" DECIMAL, "high score" DECIMAL, "average" DECIMAL, "strike rate" DECIMAL, "100s" DECIMAL, "50s" DECIMAL)

who has the highest average ?
SELECT "player" FROM table_203_226 ORDER BY "average" DESC LIMIT 1
SELECT "player" FROM "table_203_226" ORDER BY "average" DESC NULLS LAST LIMIT 1