CREATE TABLE table_204_501 (id DECIMAL, "institution" TEXT, "location" TEXT, "nickname" TEXT, "founded" DECIMAL, "type" TEXT, "enrollment" DECIMAL, "joined" DECIMAL)

out of v hawks and mustangs , who has the least enrollment ?
SELECT "nickname" FROM table_204_501 WHERE "nickname" IN ('v-hawks', 'mustangs') ORDER BY "enrollment" LIMIT 1
SELECT "nickname" FROM "table_204_501" WHERE "nickname" IN ('v-hawks', 'mustangs') ORDER BY "enrollment" NULLS FIRST LIMIT 1