CREATE TABLE table_204_842 (id DECIMAL, "institution" TEXT, "city" TEXT, "state" TEXT, "team name" TEXT, "affiliation" TEXT, "enrollment" DECIMAL, "home conference" TEXT)

the school with the most students ?
SELECT "institution" FROM table_204_842 ORDER BY "enrollment" DESC LIMIT 1
SELECT "institution" FROM "table_204_842" ORDER BY "enrollment" DESC NULLS LAST LIMIT 1